Greg Davies continues to excel as a teacher driven by cynicism - a role he created for himself with his performances in The Inbetweeners. The second series of his sitcom brings impressive people out of the woodwork (Geraldine James? Really?) and reprises a similar manic energy. Tonight's episode derives dark laughs from the excruciating demands of the school's community week and Dan's farcical attempts to woo his colleague Jo with the assistance of a second world war veteran. It seems unlikely things will end well.