Plays in a folk band called Sapphire.
She has a son Sonny (born 2001) and a daughter Honour (born 2006), with actor husband Michael Higgs. They met on the set of the TV programme The Bill (1984).
She changed her birth surname from Caplan to Catz as there was already an actress with that name. She came up with the last name after seeing a doodle of a cat but ironically she is extremely allergic to cats.
Caroline Catz has played a Police Officer in 4 different TV series. In 1998-2000, she was WPC/SGT/DS Rosie Fox in The Bill (1984). In 1999-2003, she was PC Cheryl Hutchins in The Vice (1999) for the entire 5 seasons. In 2004-2005, she was DI Kate Ashurst in Murder in Suburbia (2004) for the short series run of 2 seasons. In 2016, Caroline is playing DI Helen Morton in DCI Banks (2010) having joined the cast in 2012.