Christopher Colquhoun is an English actor. He started his acting career in 1995, debuting in an episode of London Bridge. He later had appearances in such TV shows as Gold, Silent Witness, and Holby City. Between 1997 and 2004, he became known for his multiple roles of Simon Kaminski / Luke Hutchens / Maddy Costello in the TV series Casualty. He next starred in the film Oh Happy Day, as well as played recurring parts in The Bill and Coronation Street. He continued his work on TV with guest roles in The Crash, Law & Order: UK, and Fleabag, to name a few. More recently, he played Dr. Anthony Carmichael in Vera and Agent Crown in Absentia.