In the era of Peak TV, it can be hard for shows to find footing and last for a long period of time. In its seventh season, The CW's Arrow has not only managed to carve out its groove and find a loyal fanbase, but also provide a springboard for four spin-off series and the beginning of a connected TV universe called the Arrowverse. The show recently celebrated its 150th episode, and with that comes a justified bit of fanfare and honoring the past.
The milestone episode did things a bit different and shot much of the episode in a documentary style with a crew following around Oliver and his friends. There were plenty of Easter eggs and call backs hidden within.
The documentary also unknowingly gets an interview with The Flash. The crew apparently swung by Central City to do a quick interview with Oliver's friend Barry Allen.
Since the episode was shot like a documentary about the Green Arrow and vigilantes, the "crew" had been gathering interviews from people of interest for years. This allowed the show to bring back now-deceased characters. The episode opens with a 2014 interview of Quentin Lance (Paul Blackthorne) who died at the end of Season 6 at the hands of Ricardo Diaz.
Another familiar face shows up early in the episode: Oliver's sister Thea (Willa Holland). She was a part of Team Arrow – using the codename Speedy – until Season 6 when she decided to leave the team with Roy and Nyssa al Ghul to destroy Lazarus Pits hidden around the world.