318 voters

The Best Action TV Shows of 2021

Updated April 21, 2021 2.6k votes 318 voters 22.8k views43 items

List RulesVote up the best action series that aired new episodes during the 2021 calendar year.

This list looks at the best current television action series that that will be airing new episodes in 2021. The best action series in 2021 include dramas, horror, superhero shows, spy thrillers, and even a heists. Which are the best new and returning action shows in 2021?

A really good action television series catches us up in its spell and shows like The Blacklist have kept us on the edge of our seats for years, though newer shows such as The Rookie are just as action-packed. Superhero shows and comic book TV series are both big parts of the best action series in 2021, and that of course includes The Boys and CW Arrowverse series like The Flash and Batwoman. Other great action series airing new episodes in 2021 include action sci-fi shows like The Expanse and the Spanish series Money Heist on Netflix. But not all action comes at a nerdy genre price, several 2021 action series are also good ol' crime dramas and tense procedurals, like Gangs of London, and Chicago Fire.

Which television action series are you going to watch in 2021? Keep the top of this list action-packed by voting up the best new and returning action TV shows to air in 2021.

  • 1

    The Blacklist

    James Spader, Megan Boone

    PremieredSeptember 23, 2013

    NetworkNational Broadcasting Company

    The Blacklist (NBC, 2013) is an American crime thriller television series created by Jon Bokenkamp. In exchange for immunity from prosecution, a high-profile criminal (James Spader) volunteers to...  more

    More The Blacklist 

    Ranking the Best Seasons of 'The Blacklist'#9 of 151 The Best Shows Currently On The Air

  • 2

    Gangs of London

    James Zeiss, Vanessa Molinelli

    PremieredDecember 3, 2016


    Gangs of London (Sky, 2020) is a British action–crime drama television series. When the head of a criminal organization is assassinated, the sudden power vacuum his death creates threatens the...  more

    More Gangs of London 

    #39 of 51 The Very Best British Crime Dramas, Ranked#122 of 286 The Best TV Shows Returning In 2021

  • 3

    The Last Kingdom

    Alexander Dreymon, David Dawson

    PremieredOctober 10, 2015

    NetworkBBC America

    The Last Kingdom (BBC America, 2015) is a British historical fiction television series based on Bernard Cornwell's The Saxon Stories series of novels. In 872 England, an unlikely hero (Alexander...  more

    More The Last Kingdom 

    Facts About Uhtred The Bold: Ealdorman Of Bamburgh And Inspiration For 'The Last Kingdom'#91 of 344 The Greatest TV Dramas of All Time

  • 4

    The Falcon and The Winter Soldier

    Anthony Mackie, Sebastian Stan

    PremieredMarch 19, 2021


    The Falcon and The Winter Soldier (Disney+, 2021) is an American television limited series based on the Marvel Comics' characters Sam Wilson/Falcon (Anthony Mackie) and Bucky Barnes/Winter Soldier...  more

    More The Falcon and The Winter Soldier 

    Behind-The-Scenes Stories From The Making Of 'The Falcon and the Winter Soldier'#42 of 811 The Best Original Streaming Shows of the Last Few Years

  • 5

    The Boys

    Karl Urban, Jack Quaid

    PremieredJuly 26, 2019


    The Boys (Amazon Video, 2019) is an American superhero drama web television series created by Eric Kripke, Evan Goldberg, and Seth Rogen, based on the comic book by Garth Ennis and Darick Robertson....  more

    More The Boys 

    Wardrobe Secrets From Behind The Scenes Of ‘The Boys’The Hands Down Most Gruesome Death Scenes From 'The Boys,' Ranked

  • 6

    The Expanse

    Steven Strait, Cas Anvar

    PremieredDecember 14, 2015


    The Expanse (Syfy, 2015) is an American science fiction television series developed by Mark Fergus and Hawk Ostby, based on the novels by James S. A. Corey. In a future where humanity has colonized...  more

    More The Expanse 

    Ranking the Best Seasons of 'The Expanse'#4 of 71 Sci-Fi Shows You Should Be Watching Now

  • 7

    Money Heist

    Pedro Alonso, Úrsula Corberó

    PremieredMay 2, 2017


    Money Heist (Antena 3/Netflix, 2017) is a Spanish heist television series created by Álex Pina. A group of very peculiar robbers assault the Factory of Moneda and Timbre to carry out the most perfect...  more

    More Money Heist 

    The Best Episodes of 'Money Heist'#49 of 62 All The TV Shows Ending in 2021, Ranked

  • 8

    SEAL Team

    David Boreanaz, Max Thieriot

    PremieredSeptember 27, 2017

    NetworkCBS Corporation

    SEAL Team (CBS, 2017) is an American drama series created by Ben Cavell. The drama follows the lives of elite Navy SEALs Jason Hayes (David Boreanaz) and Clay Spenser (Max Thieriot) as they train,...  more

    More SEAL Team 

    #7 of 48 The Best New CBS TV Shows of the Last Few Years#53 of 166 The Best TV Shows Returning In 2020

  • 9


    Max Irons, Brendan Fraser



    Condor (Audience, 2018) is an American television series created by Todd Katzburg and Jason Smilovic, based on the novel by James Grady. Young CIA analyst Joe Turner (Max Irons) has his idealism...  more


    #17 of 85 The Best New Cable Dramas of the Last Few Years#65 of 123 The Greatest Thriller Shows in TV History

  • 10


    Shemar Moore, Alex Russell

    PremieredNovember 2, 2017

    NetworkCBS Corporation

    S.W.A.T. (CBS, 2017) is an American drama series based on the 1975 series of the same name created by Robert Hamner. Locally born and bred S.W.A.T. lieutenant Hondo Harrelson (Shemar Moore) is torn...  more

    More SWAT 

    #100 of 130 The Best TV Shows You Can Watch On Paramount+#127 of 136 The Best Action-Adventure TV Shows

  • 11


    Jennifer Connelly, Daveed Diggs

    PremieredMay 17, 2020

    NetworkTurner Network TV

    Snowpiercer (TNT, 2020) is an American television series based on the French graphic novel Le Transperceneige created by Jacques Lob, Benjamin Legrand and Jean-Marc Rochette. Set seven years after...  more

    More Snowpiercer 

    The Best Episodes of 'Snowpiercer'#25 of 307 The Best New TV Dramas of the Last Few Years

  • 12

    The Rookie

    Nathan Fillion, Mekia Cox

    PremieredOctober 16, 2018

    NetworkAmerican Broadcasting Company

    The Rookie (ABC, 2018) is an American crime drama television series created by Alexi Hawley, based on true events. With dreams of being a police officer for the Los Angeles Police Department,...  more

    More The Rookie 

    #4 of 56 The Best New Shows of the Last Few Years That You've Been Missing Out On#36 of 83 The Best ABC Shows of All Time

  • 13

    The Walking Dead

    Norman Reedus, Melissa McBride

    PremieredOctober 31, 2010


    The Walking Dead (AMC, 2010) is an American post-apocalyptic horror television series developed by Frank Darabont, based on the comic book series by Robert Kirkman, Tony Moore, and Charlie Adlard....  more

    More The Walking Dead 

    The Best Walking Dead Characters, RankedThe Objectively Worst Decisions Made On 'The Walking Dead'

  • 14

    Doom Patrol

    Brendan Fraser, Matt Bomer

    PremieredFebruary 15, 2019


    Doom Patrol (DC Universe, 2019) is an American superhero drama web television series based on the DC Comics superhero team created by Arnold Drake, Bob Haney, and Bruno Premiani. Led by Dr. Niles...  more

    More Doom Patrol 

    The Best Characters On 'Doom Patrol'#31 of 319 The Best New Shows That Have Premiered in the Last Few Years

  • 15

    Blue Bloods

    Tom Selleck, Donnie Wahlberg

    PremieredSeptember 24, 2010

    NetworkCBS Corporation

    Blue Bloods is an American police procedural drama series shown on CBS in the United States and Canada and on Sky Atlantic in the United Kingdom. The series is filmed on location in New York City...  more

    More Blue Bloods 

    The Best Seasons of 'Blue Bloods'#21 of 79 The Best CBS Shows of All Time

  • 16

    Queen of the South

    Alice Braga, Hemky Madera

    PremieredJune 21, 2016

    NetworkUSA Network

    Queen of the South (USA, 2016) is an American television drama series adapted from the successful telenovela La Reina del Sur on sister network Telemundo and the book of the same name by Spanish...  more

    More Queen of the South 

    #18 of 50 The Best USA Network Original Series#46 of 69 The Best Suspense TV Shows

  • 17


    Angela Bassett, Peter Krause

    PremieredJanuary 3, 2018

    NetworkFOX Broadcasting Co.

    9-1-1 (Fox, 2018) is an American procedural drama television series created by Ryan Murphy and Brad Falchuk. The show explores the high-pressure experiences of police, paramedics and firefighters who...  more


    #1 of 38 The Best Current Fox Shows#6 of 24 The Best New Procedural Dramas of the Last Few Years

  • 18

    Kung Fu

    Olivia Liang, Shannon Dang

    PremieredApril 7, 2021

    NetworkCW Network

    Kung Fu (The CW, 2021) is a American martial arts action-adventure drama series created by Christina M. Kim and based on the 1972 television series of the same name created by Ed Spielman. Set in the...  more

    More Kung Fu 

    #121 of 309 The Best Female-Led TV Shows#33 of 48 The Best TV Shows with Non-White Stars

  • 19

    Chicago P.D.

    Jason Beghe, Patrick Flueger

    PremieredJanuary 8, 2014

    NetworkNational Broadcasting Company

    Chicago P.D. (NBC, 2014) is an American police procedural drama television series created by Dick Wolf and Matt Olmstead. The show follows the Chicago Police Department uniformed cops who patrol the...  more

    More Chicago P.D. 

    Best Seasons of 'Chicago P.D.'#287 of 631 The Best TV Shows To Binge Watch

  • 20

    Alex Rider

    Otto Farrant, Brenock O'Connor

    PremieredJune 4, 2020


    Alex Rider (Prime Video, 2020) is a British action, spy, thriller based on novel series of the same name by Anthony Horowitz. The series follows London teenager Alex Rider, who is recruited by the...  more

    More Alex Rider 

    #10 of 29 The Very Best British Teen Shows, Ranked#33 of 64 TV Shows We've Already Seen (And Loved) As Both Movies And Books

  • 21

    The Flash

    Grant Gustin, Candice Patton

    PremieredOctober 7, 2014

    NetworkCW Network

    The Flash (The CW, 2014) is an American superhero television series developed by Greg Berlanti, Andrew Kreisberg, and Geoff Johns, based on the DC Comics character. CSI Barry Allen (Grant Gustin)...  more

    More The Flash 

    The Best Characters On 'The Flash'#431 of 508 The Best TV Theme Songs of All Time

  • 22


    Jared Padalecki, Kale Culley

    PremieredJanuary 21, 2021

    NetworkCW Network

    Walker (The CW, 2021) is an American western, action-drama television series written by Anna Fricke and a reboot of the television series Walker, Texas Ranger. It focuses on Walker as he returns from...  more

    More Walker 

    #47 of 78 The Best TV Reboots & Revivals#206 of 285 The Best New TV Shows Of 2021

  • 23

    Fear the Walking Dead

    Lennie James, Alycia Debnam-Carey

    PremieredAugust 23, 2015


    Fear of the Walking Dead (AMC, 2015) is an American post-apocalyptic horror drama television series created by Robert Kirkman and Dave Erickson, and prequel series to The Walking Dead, which is based...  more

    More Fear the Walking Dead 

    The Best Characters On 'Fear the Walking Dead'#114 of 202 The TV Shows with the Best Writing

  • 24

    Legends of Tomorrow

    Brandon Routh, Dominic Purcell

    PremieredJanuary 21, 2016

    NetworkCW Network

    DC's Legends of Tomorrow (The CW, 2016) is an American superhero action-adventure television series spin-off from Arrow and The Flash, existing in the same fictional universe. Intending to stop him,...  more

    More Legends of Tomorrow 

    The Best Characters On 'Legends of Tomorrow'#156 of 235 The Greatest TV Shows for Women

  • 25

    Magnum, P.I.

    Jay Hernandez, Perdita Weeks

    PremieredSeptember 24, 2018

    NetworkCBS Corporation

    Magnum, P.I. (CBS, 2018) is an American crime drama series, and a remake of the 1980 series. An ex-Navy SEAL (Jay Hernandez) returns home from Afghanistan and uses his military skills to become a...  more

    More Magnum, P.I. 

    #9 of 22 The Best '80s TV Reboots#112 of 131 The Best TV Crime Dramas