Goodnight Sweetheart

BBC1, 9pm, Friday

Writers Laurence Marks and Maurice Gran extend the narrative of their original time-travelling sitcom, reuniting Nicholas Lyndhurst, Elizabeth Carling and many of the original cast.

Seventeen years on and living in 1962, Gary realises he has the opportunity to witness himself being born.

The long-lost time portal is re-opened and Gary finds himself catapulted into 2016.