Marilu Henner, credited as consultant on many episodes, has the same autobiographical memory condition as the main character in the show.
Carrie wears a pendant of Australia in her necklace since Poppy Montgomery is Australian.
Carrie (Poppy Montgomery) suffers from a condition called Hyperthymesia, which is a condition that 'allows for an uncanny recollection of personal memory'.
Originally debuting in 2011 and then canceled by CBS after the first season, this show was revived as a summer series in 2013. It then ran for two more seasons before getting canceled a second time in late 2014. In early 2015, the cable network A&E picked it up, announcing another 13 episodes. A&E aired the first and second episodes of season 4 on the day after Thanksgiving (November 27, 2015), with follow-on episodes to air weekly on Friday. On February 16, 2016 A&E announced it had been canceled for a third time.
In several episodes, Carrie demonstrates a 'trick' of her memory - someone gives her a date, and she tells them what day of the week it was, sunrise/sunset, and major events of the day. Her recollections are accurate - times for sunrise and sunset are based on NYC time.