Subject: Christmas Night with the Stars BBC Four Christmas day 9pm 20/12/2017 18:07 GMT
According to the web site this hasn't been repeated since 1972!
From the BBC programme page!
Ronnie Corbett and Ronnie Barker host a seasonal variety programme, first broadcast on 25 December 1972. With stars including Lulu and Cilla Black, comedy sketches from The Goodies, The Liver Birds, Mike Yarwood and Dad's Army.