Jonathan Wright (I)

Ever adept at attracting top-line talent, Graham welcomes Thor star Chris Hemsworth and director Ron Howard (Apollo 13) to his sofa. The duo plug cinematic epic In the Heart of the Sea, based on Nathaniel Philbrick's account of the real-life whaling expedition that inspired Moby-Dick. Lily Tomlin, tipped for an Oscar for her role in Grandma, also guests, as does comedian Kevin Bridges. Blake and Dame Shirley Bassey, who have collaborated on a new Christmas single, provide the musical entertainment.

Toast's love life is in the doldrums. Luckily, Ed's girlfriend, Penvelope, has a friend, Clancy Moped (Sophie Colquhoun), "a weather girl off the television" who sports a Pussy Riot T-shirt. All goes well until Toast and Ed are asked to judge the International Beauty Contest for Women, a secretive event in the age of feminism. Fitfully amusing - especially the bits tonight with Peter Davison - but three series in, it's difficult to shake the idea that Toast's peculiarly heightened world has become too self-contained and self-referential.

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?"