Jonathan Wright

Sharon Horgan and Rob Delaneys genius sitcom continues with Sharon suffering badly from the baby blues. But that's OK, because she's been prescribed drugs and now feels "borderline nothing - but in a good way". Meantime, Rob's sexual frustration is becoming acute and a flirtation at work moves him into risky territory. A comedy that's centred on a couple whose actions are often dubious, yet with whom you can't help but identify; watch tonight as Sharon, frustrated by the demands of motherhood, turns friend-stalker.

Even by his own grim standards, Martin is being spectacularly grumpy. But he has good reason to be unhappy, what with therapist Dr Timoney advising Martin and Louisa to consider parting. "Accepting separation is a success in itself," she reckons. Elsewhere, Martin has a new neighbour, Erica the arty art teacher (Kelly Adams of Hustle fame); and a visiting American - in one of the more unlikely TV cameos of recent years - turns out to be Sigourney Weaver. Undemanding fare, at least until a final scene that may floor you.

What do you do if a lonely little scruffy dog is stalking you? If you're Doc Martin, after being prevented from giving the mutt a lethal injection, you take it to a hippyish vet, Angela Sim (Caroline Quentin). Chuck in such plot developments as illegal liquor distillation and the perils of self-medication, and that's about as exciting as Doc Martin gets. Impressive, then, that it seems more than the sum of such inconsequential parts, perhaps because the ongoing odd-couple romance between Louisa and Martin anchors the dramedy.

In which mostly grumpy and sometimes quite old celebs reflect on the problems that ensue when leaving the house to go to work or the shops, or even to head out on holiday or for a jolly. In more detail, that means the likes of James Corden, Jonathan Ross, Ruth Jones and Stephen Mangan discussing the guilty thrill of buying a cheap round down the pub, the seething anger that underpins making tea for office colleagues, and performance anxiety - when packing shopping at the supermarket.

The series adapted from children's books by Henry Winkler and Lin Oliver returns for a second season. Based on Winkler's own experiences growing up with dyslexia, but with events transposed from the US to Yorkshire, it also stars the man who was Fonzie as teacher Mr Rock, an understanding counterpoint to Ms Adolf (Felicity Montagu). In today's opener, McKelty ruins Hank's school photograph by spraying him with pop. Hank (Nick James) is determined to get himself cleaned up and back in front of the camera.

This week, Hollywood star Samuel L Jackson promotes action-adventure movie Big Game, which finds him starring as the US president, a man stranded in the Finnish wilderness after terrorists target Air Force One. Joining him will be actor and writer Stephen Merchant, and US standup Amy Schumer. Power trio Muse provide the music.

Paul Abbott's police procedural continues with an episode that finds racial tensions simmering. It's all because of an attack on an Asian woman that appears to have been racially motivated. Will an undercover operation bring a suspect to justice? Meantime, DI Viv Deering (played by Joanna Scanlan as a kind of gruff-but-sensitive auntie) and her team are back on the serial killer investigation. This takes on new urgency because psychologist Dr Peep (Kate O'Flynn) thinks the murderer may strike again.

Episode two of Paul Abbott's police procedural and, having lost the serial-killer investigation to another team, DI Viv Deering (Joanna Scanlan) and her team instead target an illegal drugs factory. Meantime, attack survivor Cathy is staying at the home of DC Dinah Kowalska (Elaine Cassidy). Early days, of course, but this is shaping up to be something special, thanks to a combo of memorable characters, clever plotting and terrific one-liners. A suspect critiques Viv's approach to interrogation: "Where were you trained, Currys?"

They've escaped. With Pucks! cancelled, scriptwriters Beverly and Sean are back in London. Except their "shitty sitcom no one watched" has, somehow, been renewed and the duo find themselves back in LA with a version of Matt LeBlanc still phoning in his Joey-from-Friends persona. Thus season four of the telly-about-telly series begins, and it's good to have it back because it's sharply written and funny. Tonight, Matt gets bad financial news. Beverly: "You can have a very nice life, even with as little as $31m."

With three days to go before polling day, we can presumably expect events in the election battle bus sitcom to grow ever more frenetic. But in a controlled way, because Andy Hamilton and Guy Jenkin perfected the knack of dropping topical material into the mix at the last moment back in their days writing Drop The Dead Donkey; while the likes of Hugh Dennis, Ben Miller and Sarah Hadland can be relied on not to fluff their lines. Continues and concludes tomorrow and Wednesday.