Down, down, deeper and Downton

This week’s Telly Addict bids a merry, upbeat farewell to Series Four of Downton Abbey on ITV; measures the running time of two extra-length comedies, Fresh Meat on C4 and Ambassadors on BBC2; sings along without much gusto to The Choir on BBC2; squares up to Bouncers on C4; frets over the dog on Bates Motel on Universal; and wonders if Portrait Artist Of The Year on Sky Arts1 will draw a crowd.