One of the most kick ass heroines on science fiction TV is Max Guevara or X5-452 as the bar-code on her neck says.
Girls kick ass; says so on a t-shirt
Name: Max Guevara (X5-452)
Portrayed by: Jessica Alba, Geneva Locke, and Brittany Cuevas
TV Series: Dark Angel (2000-2003)
Original channel: FOX
Status: Ended after 2 seasons, 43 episodes
Max Guevara is the protagonist of the Dark Angel TV series. The two season show chronicles her life in a post apocalyptic Seattle where she tries to live a normal life, elude capture by government agents, while searching for her brothers and sisters. She escaped from a covert government research facility codenamed Manticore as a nine year old child and the government have been hunting her and her fellow escapees ever since. USA is a third world country since the Pulse that destroyed most electronics, run as a police state.
The first season begins in 2019, ten years after Max escape. Max work as a bike messenger during the day and as a cat burglar during the night. She has to deal with a crazy reactionary boss called Normal, getting expensive medicine for her shakes and evading a persistent government agent named Lydecker.