Lewis, ITV1, 9pm

HAVING been off the Force for over a year does Lewis find it easy to pick up his skills as a detective? “Well the actor does, I’ve been doing it long enough!”, laughs North-East actor Kevin Whately.

“Yes, I think Lewis finds it all right to settle back into it. He’s back in his natural habitat after all.”

One person who hasn't been best pleased to see Lewis working again is his partner Laura Hobson, played by Clare Holman.

“Lewis and Hobson are a couple, living together and quite domesticated. She’s angry at when she sees him on the job because he didn’t tell her. But she recognises he needs to keep on working and supports his decision.

“I think they find it a bit odd going back to working together, but on the whole it seems to be going well. They are very natural in each other’s company.

“I like working with Clare, we’ve always got on well so it’s nice to share plenty of scenes together.”

After a difficult start, the Lewis/Hathaway partnership seems to have achieved some semblance of normal. DS Maddox (Angela Griffin) has become integral to the team. But the team’s abilities are sorely tested investigating the brutal murder of an American classics student, Rose Anderson (Alisha Bailey).

Suspicion immediately falls on young astrophysics professor Felix Garwood (John Light), who had recently broken off an affair with Rose and was knocked off his bicycle by his jilted lover in the hours preceding the murder. And Felix happens to be married to Rose’s DPhil supervisor Philippa Garwood (Andrea Lowe) – could the jealous wife have committed murder?

But the more the detectives delve, the more secrets and murky motives they uncover. Rose’s flatmate, Chloe Ilson (Jessica Henwick), is mixed up with the criminal activities of her bouncer boyfriend Harrison Sax (Michael Ryan) – did they kill Rose to keep her quiet? And then there is Rose’s other life, playing private tutor to Philippa’s anemic ten-year-old niece Tabitha Brightway (Kitty Rich). When it turns out that Tabitha’s parents, Jennie (Sian Brooke) and Paul (Jason Done), have used Rose’s money to pay for their latest attempt to create a "saviour sibling" to remedy Tabitha’s rare genetic disorder, Lewis, Hathaway and Maddox start to question their motivation.

The case soon takes a classical turn when it transpires that respected don Simon Flaxmore (Clive Merrison) – Philippa’s mentor and he reason Rose came to study at the college in the first place – might be hiding dark secrets of his own. Deep in Rose’s work is a revelation that threatens Simon’s career. When a second murder takes place, the detectives realise they might very well be the chorus in an unfolding Greek tragedy. Desperate for answers, Hathaway finds himself turning to one of his chief suspects for guidance.

Citizen Khan (BBC1, 8.30pm)

DURING a recent episode of Would I Lie To You? Adil Ray revealed he had once been told off by a Greek boat owner for sailing too far out to sea. Comedy fans will tell you, that's definitely not to kind of thing Mr Khan would get up to.

Ray writes and stars in this sitcom about Khan's disastrous decisions. "It's testament to the whole team that we have got this far," he says. "I just can't wait to get back in the studio with the entire Citizen Khan family. As the great British public get even more familiar with Mr Khan, it really excites me when I think about the places we can go. The Bahamas?"

Instead, he keeps it more down-to-earth in the first episode, which sees the Khan family return from a trip to Pakistan with Mrs Khan's mother in tow. Mr K is keen on her moving into a care home, until he realises that she’s loaded.

Rome: The World's First Superpower (Channel 5, 8pm)

Larry Lamb continues his journey into the great civilisation's history by delving into the year 400BC, when the empire was 300 years old, had already conquered its nearest neighbours, the Etruscans, and appeared to be invincible. But there was no time for its leaders to rest on their laurels because the Gauls were on their way. For the next three years, Rome was caught up in a battle with its enemy, and only just survived an onslaught. After that, it adopted the 'best form of defence is attack' approach.