Ambulance is on BBC One at 9pm.

Return of the documentary series, which this year follows the paramedics of the North West Ambulance Service.

Gordon, Gino and Fred, Road Trip is on ITV at 9pm.

Chefs Gordon Ramsay, Gino D’Acampo and maître d’ Fred Sirieix journey to France, to take part in an oyster festival.

Avalanche, Making a Deadly Snowstorm

Professor Danielle George joins an experiment to find out more about the destructive power of avalanches, by setting one off in a remote valley in the Canadian Rockies.

The Flash is on Sky One at 8pm.

Return of the US fantasy drama. The hero is back in action, alongside his daughter.

The Big Bang Theory is on E4 at 8.30pm.

The start of the twelfth series of the US comedy. Amy and Sheldon go on honeymoon, but don’t get very far. New series of Happy Together and New Girl follow at nine and nine thirty.

Empire is on Five Star at 10pm.

Return of the US music drama. Lucious and Cookie encounter a singer with the potential to be the next big thing.