What to watch this week.
Monday, BBC Two
In the first heat, Clive Myrie puts four contenders to the test as they answer questions on specialist subjects including Bruce Springsteen, Switzerland and Sir Roger Moore.
Tuesday, Channel 4
Tuesday, Sky Atlantic
In the wilds of Britannia, Cait considers her next move, while Ania and Willa broker a meeting between Veran and Aulus.
Mortimer & Whitehouse: Gone Fishing
Sunday, BBC Two
The series begins with Paul and Bob taking a trip to North Uist in the Outer Hebrides to catch fresh sea trout.
DCI Vera Stanhope must unravel the mystery when well-respected local builder and family man Jim Tullman is found beaten to death on the steps of the Collingwood Monument the day before he was due to testify in court as the key witness in a violent assault case.
Sunday, BBC One
When a crew member is found dead aboard the Trident nuclear submarine HMS Vigil, Detective Amy Silva is flown out to investigate.
Celebrity SAS: Who Dares Wins
Sunday, Channel 4
In the first episode, they must brave an aerial assault course designed to test how candidates manage fear, and carry out a hostage rescue in a building that has been exposed to CS gas.