Career
He is known for his role of Patrick McGuire in the British Broadcasting Corporation soap Doctors, in which he had a minor recurring role from 2001 to 2003 and again in September 2010. McKenna"s television work includes Yorkshire Television"s The Brides in the Bath, Waking the Dead, The Bill, Judge John Deed, Spooks, Lead Balloon, and Life Begins. Alan is also a recurring character in Little Mission Jocelyn.
He played Detective Inspector Philosophy Crabtree in the 2014 crime drama Happy Valley.
He voiced various characters in the video game Titanfall. In 2015 he played Rhodri Probert in the Independent Television television series Midsomer Murders episode 17.2 "Murder by Magic".
His film work includes Blessed with Heather Graham, David Hemmings and Andy Serkis. Second in Command alongside Jean-Claude Van Damme, An American Werewolf in Paris with Julie Delpy and Dangerous Parking.