Accelerate

"Accelerate" is the 21st episode of the second season of the WB original series, Smallville. The episode was written by Todd Slavkin & Darren Swimmer and was directed by James Marshall. It originally aired on May 6, 2003. After a movie night at the Talon, Lana starts to see an old childhood friend named Emily who died 6 years ago. She is convinced that she is seeing ghosts because Emily can appear and disappear at will. Clark sees differently -- she is simply moving really fast, in the same way he can. It turns out that Emily's father has been cloning humans with the help of liquid Kryptonite, using his deceased daughter as a template. But there's a flaw with the Emily clone -- she has no sense of morality and no conscience, which...