TWO DOORS DOWN (BBC 2)

If this was real life, the characters of Eric and Beth Baird (played with remarkably straight faces by Alex Norton and Arabella Weir) would surely have moved house by now.

Either that, or been convicted of doing away with their neighbours.

Every week, their home is a magnet for the most annoying residents of their housing estate and what results is equal parts hilarious and cringeworthy.

In the first episode of the sitcom’s fourth series, the writers turned the cringe dial all the way up to mortified as the insufferable Cathy attempted to make Eric and Beth’s wedding anniversary celebrations all about her.

The recreation in the middle of Beth’s living room of Cathy and husband Colin’s wildly inappropriate wedding dance was hilarious, as was Cathy’s attempts to force two marriage proposals out of the young couples in the room.

The quality of the third series took a slight dip in comparison to the lofty standards that had come before, but the introduction of two new characters, played by Grado and Joy Mcavoy, looks to have given the writers a boost.

The interaction between Joy and jealous Cathy going forward should be a thing to behold. This American thriller sneaked on to the BBC 4 schedules without much fanfare just before Christmas, but should have been seen by a much bigger audience.

Reminiscent of Sharp Objects in its use of flashbacks and slowly unpeeling layer after layer of intrigue, Jessica Biel and Bull Pullman were terrific as the mother who had no idea why she carried out a seemingly random murder and the detective determined to help her.