The Bletchley Circle, San Francisco is on ITV at 9pm.

Four-part drama spin-off, set in the mid-1950s, starring Rachael Stirling and Julie Graham. Code-breakers Millie and Jean travel to California, to help track down a serial killer.

Who Do You Think You Are? Is on BBC One at 9pm.

Culture Club singer Boy George traces the story of his maternal grandmother, who was found wandering the streets of Dublin as a child and put in a children’s home.

Animals Behaving Badly is on BBC One at 8pm.

Liz Bonnin examines animals that do whatever it takes to find food, including macaques that use psychology to pull off a theft.

Coppers, Drugs Bust is on Channel Five at 9pm.

One-off documentary looking at covert surveillance operations used by the police, to fight organised drug crime.

Picnic at Hanging Rock is on BBC Two at 9pm.

The missing Rothschild heiress, Irma Leopold, is found unharmed, but claiming to remember nothing, while the Sergeant focuses his attention on the college.

Mortimer and Whitehouse, Gone Fishing is on BBC Two at 10pm.

In the final episode of the angling series, Paul and Bob fish for pike on the River Test, and invite a cardiologist for dinner to talk about their medical past and future.

This Is Us is on More4 at 9pm.

When the young Pearson family is struck down with chickenpox, Rebecca’s overbearing mother decides to pay a visit.