Snooker: The Masters
1pm, BBC2
Coverage of the opening match on day two of the invitational tournament from Alexandra Palace in London, which features Judd Trump against Stephen Maguire. This pair met in the semi-final of last month’s UK championship, with Trump winning on that occasion, but since then, Maguire has shown a flash of form, including victory in the Lisbon Open before Christmas (yes, snooker has reached Lisbon). Among the commentary team are Stephen Hendry and Steve Davis. David Stubbs
Silent Witness
9pm, BBC1
Close to two decades since the first episode aired, Silent Witness continues to be a ratings banker for Auntie. And if you haven’t checked in recently to see the work of Dr Nikki Alexander (Emilia Fox, who seems to have grown into her role) and co, tonight’s episode shows why it continues to be popular, offering up a potent mix of a serial-killer storyline, mild police incompetence and scenes of underground London. The plot is not wholly convincing, but a creepy atmosphere is sustained. Story concludes Tuesday. Jonathan Wright
What’s the Right Diet for You? A Horizon Special
9pm, BBC2
Eleven million Brits are on diets, which fail in about 80% of cases. Could it be because people are on the wrong regimes? Possibly – which is why 75 volunteers tried personalised diets as part of a national weight-loss experiment. Scientists prepared diets based on individual biological profiles, hormones and neuroscience. For the next three months, the results were monitored by clinical psychologist Tanya Byron and doctor Chris van Tulleken. Continues Tuesday and Wednesday. Bim Adewunmi
Broadchurch
9pm, ITV
After a scrupulously observed PR lockdown, we now know how writer Chris Chibnall is rebooting his police procedural. Which is a wholly inadequate description for such a multilayered series – especially one that looks set to be driven by a courtroom drama (the trial of Joe Miller, who has pleaded not guilty to Danny Latimer’s murder) and a cop with a dicky heart abandoning procedure as he protects a figure from a previous case, Claire Ripley (Eve Myles). Hooked already. JW
Bodyshockers: Nips, Tucks and Tattoos
10pm, Channel 4
Katie Piper meets people desperate for extreme nips, tucks, tattoos and piercings, as well as others who are sick of their attention-grabbing alterations. Wannabe police officer Hannah has grown to loathe her surgically enhanced double-G bust, but can she dissuade 21-year-old Savannah from also having implants? Plus, we meet the embarrassed owner of a phallic tattoo, a male model looking to restore his crowning glory and an internet celeb with a “hole” new take on body modification. Hannah J Davies
Closing Time – Norwich After Dark
10pm, Channel 5
Swamped with drunken antics, the British city centre at closing time comes under scrutiny in this fly-on-the-wall series. Cabbies, fast-food peddlers, bouncers and paramedics are among those facing the carnage caused by pissed-up casualties. This week, Norwich is in the spotlight, with its well-subscribed city-centre medical bus. Also featured: Courtesy Taxis, the firm that holds the honour of having the UK’s biggest waiting room, a magnet for the excessively refreshed. Ben Arnold
Drunk History
10pm, Comedy Central
Getting comedians sloshed and having them recount the tales of historical figures is a malleable format. Having started out as a web series and then graduated to full broadcast, Will Ferrell and Adam McKay’s Drunk History now receives a UK remake. The star wattage isn’t as high as its US counterpart (it had Jack Black, Winona Ryder and Dave Grohl), but there are still some redoubtably funny people involved, including Simon Bird, Tom Rosenthal and (playing Oliver Cromwell) Mathew Horne. Gwilym Mumford
Girls
10pm, Sky Atlantic
Since season three of Girls first aired at the start of 2014, Lena Dunham has continued to stride away from her perennially lost and self-sabotaging alter ego Hannah Horvath, publishing her memoirs at 28 and establishing herself as one of the characters at the centre of contemporary popular culture. As Girls returns for its fourth run, such successes are still evading Hannah, who decides to leave New York for a writers’ workshop at the University of Iowa. Rachel Aroesti
