Margaret and Ken invite all the family round to celebrate their golden wedding anniversary.

Jane plans the party surprise to end all surprises, and 17 year old Nick's joy is unbounded to discover Chloe has a bit part in the new Star Wars film. Grandma Doris' contribution to the festivities is somewhat uninhibited, and her Alzheimer's makes Ian and Jane reflect on what really matters.

Richard Herring's comedy about four generations of a family.

Starring Alison Steadman, Phil Davies and Richard Herring.

Relativity is a witty and loving portrait of family life, with affectionate observation of inter generational misunderstanding, sibling sparring and the ties that bind, that will resonate with anyone who has ever argued with their dad about how to pronounce crisp brand names.

Margaret ...... Alison Steadman
Ken ...... Phil Davis
Jane ...... Fenella Woolgar
Ian ...... Richard Herring
Chloe ...... Emily Berrington
Pete ...... Gordon Kennedy
Holly ...... Effie Woods
Mark ...... Fred Haig
Nick ...... Harrison Knights
Doris ...... Marion Bailey

Producer: Polly Thomas
Executive Producers: Jon Thoday and Richard Allen Turner

An Avalon Television production for BBC Radio 4, first broadcast in September 2017. Show less