The return of Charismatic Mike, one of Ellen's ex-lovers, gives Stephen food for thought - if this whirlwind of a man is his biological father, maybe he isn't destined to be a poor copy of Laurie after all? Meanwhile, Geoff considers renting a JCB to exhume his late brother, and Alison's exasperation with her ageing parents leads to her getting help from an unlikely good Samaritan. Black comedy, starring David Mitchell, Robert Webb, Penny Downie, Geoff McGivern and Anthony Head