Annie Cartwright

"We all feel like jumping sometimes, Sam. Only we don't. Me and you, because we're not cowards."

- Annie Cartwright

WPC/DC Annie Cartwright is the tritagonist and lead heroine of the BBC series Life on Mars. She is a young female police constable who Sam Tyler meets when he is in 1973. At the end of the opening episode of season 2, she is promoted to Woman Detective Constable on Sam Tyler's recommendation.

Annie was the only person that Sam spoke to about his origin. Although she remained sceptical, she recognised Sam's skills as a police officer and his more progressive attitude. Eventually the two fall in love, and she becomes the main reason Sam chooses to return to 1973.

She is portrayed by Liz White.