Standup comedian Tim Renkow’s blacker-than-black comedy Jerk is upping its game for its third series. The sitcom, about a man called Tim who has cerebral palsy and is a self-described terrible person, deserves a bigger audience. It has been given more episodes, moving from four guest stars per series to six – in the form of Sally Phillips, James Norton and Big Zuu, which should help it to gain the recognition it deserves. Renkow, who co-writes with Shaun Pye (There She Goes, The Increasingly Poor Decisions of Todd Margaret) has come up with the sort of comedy that wants you...