Classic Mary Berry is on BBC One at 8.30pm.

In the first of a six-part culinary series, the food writer prepares slow-cooked lamb shanks, and rich chocolate truffle pots.

Marcella is on ITV at 9pm.

In the third episode of the detective drama, Marcella pays another visit to Reg Reynolds, before another body is found.

MasterChef is on BBC1 at 9pm.

The culinary contest returns. John Torode and Gregg Wallace challenge seven hopefuls to prepare a delicious meal in one hour. Continues on Thursday.

Collateral is on BBC2 at 9pm.

In the third episode of the thriller, Kip and Nathan struggle to figure out how the two murders are linked.

The Unstoppable Flying Scotsman is on Channel 5 at 9pm.

A two-part documentary in which Rob Bell charts the history of the world’s most famous steam locomotive. Concludes next week.

Electric Dreams is on Channel 4 at 10pm.

Return of the sci-fi anthology based on the stories of Philip K Dick. An 11-year-old boy fears Earth has been infiltrated by an insidious alien threat.

The Walking Dead is on Fox at 9pm.

The series returns after its winter break. The impact of the war between the survivor enclaves is felt, and Carl must come to terms with his fate.