Acting
John Dair (3 March 1933 – 25 November 2005) was a Scottish actor who was best known for his role as Harry Grout’s bodyguard "Crusher" in the sitcom Porridge and as Charlie Dawson in the drama Our Friends in the North.
Although born in Dundee, Scotland, Dair was a resident of London, England, for many years.
He drove mobile cranes and bulldozers on building sites and then worked as a singer, until he was offered the part in Porridge whilst performing at the Lyceum Theatre, London. He appeared in one of the most memorable scenes in the sitcom in which his character displays a "sense of humour …

Our Friends in the North
as Charlie Dawson · 3 ep.

The Detectives
as Masseur · 1 ep.

Jack the Ripper
as Isenschmid · 2 ep.

Filthy Rich & Catflap
as BBC barman · 1 ep.
Sharon and Elsie
as Mick Wainwright · 1 ep.
The Squad
as Café Owner · 1 ep.

Porridge
as Crusher · 1 ep.