Our Girl is on BBC One at 9pm.

In an episode postponed from last week, the squad begin their own investigations into Bones’s death, and the attempt on Inspector Chowdhrey.

Long Lost Family is on ITV at 9.30pm.

Return of the series in which Davina McCall and Nicky Campbell help people reunite with long-lost relatives. Tonight’s edition includes a woman whose Colombian birth mother gave her up for adoption.

Holby City is on BBC One at 8pm.

Sacha tries his hand at a new romance, Meena moves in on Nicky’s turf on the Darwin ward, and Donna puts Zav to the test.

Inside the Factory is on BBC Two at 8pm.

Return of the documentary series. Gregg Wallace explores a coffee factory in Derbyshire, that produces 175,000 jars of instant coffee a day.

The Five Billion Pound Super Sewer is on BBC Two at 9pm.

This three-part documentary series follows a huge engineering project to expand London’s sewer network. Tonight, an 80-metre-deep shaft needs to be dug.

Mark Kermode’s Secrets of Cinema is on BBC Four at 9pm.

The film critic presents this five-part series in which he explores movie-genre conventions, beginning with romantic comedies.