JUST as we are all looking forward to getting out of the house, along comes a reason to stay in. Line of Duty (Sunday, BBC1, 9pm) is back, and with it the chance to thrill all over again at those tension-fuelled interview scenes (BEEP!) and Ted’s catchphrases (something about Jesus, Mary and Joseph sucking diesel?).

We can also continue to wonder where on Earth DS Arnott (Martin Compston) buys those waistcoats, given they have been out of fashion since 1973.

In this, the sixth series, Vicky McClure, Adrian Dunbar and Martin Compston are joined by Shalom Brune-Franklin, a new addition to the AC12 team as DC Chloe Bishop.

Kelly Macdonald is this season’s big name guest, following the trail blazed by Thandie Newton, Lennie James, Keeley Hawes, Danny Mays and Stephen Graham. The Boardwalk Empire and No Country for Old Men star plays Detective Chief Inspector Joanne Davidson, the senior investigating officer on an unsolved murder case whose suspicious conduct attracts the attention of Anti-Corruption.

Jed Mercurio, writer, executive producer and showrunner, describes Macdonald’s character as “the most enigmatic adversary that AC-12 have faced to date.” Quite the accolade, given the spectacular story arcs of her predecessors.

Macdonald says the interview scenes were the thing that filled her with most dread, but in the end she really enjoyed them.

“One of the scenes is bigger than anything I’ve ever done before – I think over half an hour,” she says. “We filmed it over two days and on the first day, the cameras were only on my character. I was told there were 50 cameras set up on me just in that one day, which is mind-blowing. It was like doing a play.”

Like humans, dogs have their favourite TV shows, with Countryfile and Crufts high on the list of appointment viewing. My girl adores Dogs Behaving (Very) Badly (Channel 5, Tuesday, 8pm). Not for the nifty camerawork or the pithy commentary by Joanna Scanlan, but because every time it is on she is showered with treats. When I see the trials some dogs put their owners through I am grateful all over again for my perfectly behaved hound (nothing to do with me BTW: she arrived like that).

What a bunch there have been in series three, the finale of which airs this week. The fully grown husky who would not walk up or down stairs and had to be carried; the Afghan hound puppy with a genius for getting into trouble; the barkers and growlers; the bolters and the territory titans – dog trainer supreme Graeme Hall takes them all in his stride.

As is usually the case, the problems can lie as much with the humans as the dogs. People make all sorts of assumptions about their pets when in reality the situation, as far as the dog is concerned, is quite simple. They just want humans to be clear with them. Oh, and to be rewarded for good behaviour with treats and praise, of course. In that, dogs and humans are very alike.

Much as I would like to meet Hall, who has been wearing the same “uniform” of tweed jacket and drainpipe jeans since I’ve been watching this series, I would not apply to go on the show. No need, as I’ve explained. Smug? Moi? You bet. Although she did pinch a slice of bread off the countertop the other day, so I shall keep the situation under review.

Filming under Covid restrictions has made programmes look and feel different, and not always for the better. In the new game show This is MY House (BBC1, Wednesday), the producers have gone as far as keeping the celeb guessers in one building and everyone else in another.

The format is strange enough even without that. Four people pretend to be the person who owns a house. The panel, which for the first episode includes Bill Bailey and Laurence Llewelyn-Bowen, observe the four going about the property, chatting to each other, undertaking tasks, and generally staking their claim to be the bona fide owner.

The celebs have to work out which one is the genuine article, and which is the painted MDF, using nothing more than gut instinct and in the final round some carefully crafted questions.

If they guess correctly, the homeowner wins £1000. Think a bargain buy What’s My Line meets Through the Keyhole and you will arrive in the right postcode.

Guiding everyone through the maze of challenges is Stacey Dooley, like Bailey a Strictly champion, and she needs some pretty nifty footwork to keep this show on the road.

Ridiculously overstretched at an hour (another Covid-hangover we will be seeing a lot of I’m afraid), and rather predictable. On the plus side it is endearingly daft and undemanding, and with the right mix on the panel, the banter zips along.