Cartwright is the only person in 1973 who Sam tells that he has travelled back in time, and she treats him sympathetically, believing that he is suffering from severe concussion after being hit by a car.

During the first episode of series one, when Sam climbs onto the police station roof, considering suicide, Cartwright convinces him not to jump.

Upon Sam first losing consciousness after the car accident which sent him back in time, he sees a fleeting image of a woman in a red dress running away from an attacker.

No references are made to Annie's family in either the first or second series, apart from a mention of an unnamed nephew in "The Crash", which indicates that she has a brother or sister.

In the US remake, Annie Norris (Gretchen Mol) is a uniformed policewoman with an undergraduate psychology education who has aspirations of making the detective squad.