Greg Davies is an awardwinning standup comedian writer and actor known for starring in his critically lauded sitcom Man Down Channel 4 After playing the infamously psychotic Head of Sixth Form Mr Gilbert in The InbetweenersChannel 4 and its two spin off feature films Greg went on to appear in Cuckoo BBC Three alongside Andy Samberg and Taylor Lautner which earned him a BAFTA nomination for Best Male Performance in a Comedy Programme He made a guest star appearance as King Hydroflax in the 2015 Doctor Who Christmas Special BBC One and voiced Balloon Man in the feature film Teen Titans Go To The Movies Warner Bros