Dad may have caused both Mum's leaving and Angry Kids behavior, with his neglect/abuse and possible alcoholism, as seen in the Angry Kid special. Unlike most characters, Dad is never seen on camera. In the Series 3 episode "Stephen", it is revealed that Dad is saddened that Mum is now in a relationship with another man named Stephen.
Dad wears a black long-sleeved shirt
Dad was voiced by David Holt. <-- LEGEND