Born Leeds, England and trained at Old Vic Theatre School, 1947-1949. First stage appearance in "Tough at the Top" .
He played the Doctor in two "Doctor Who" Unbound audio plays, "Auld Mortality" and "A Storm Of Angels".
He served in the Royal Air Force prior to training to be an actor.
Has said in an interview he was offered the role of the first Doctor Who (played by William Hartnell). This is at odds with most documents of the official history of the series, which have stated that Hartnell was the third choice after Cyril Cusack and Leslie French. Bayldon was considered for several roles in the series, including Sir Robert Muir in "Doctor Who" {Black Orchid: Part One (#19.17)} , Lord President Borusa in "Doctor Who" {Arc of Infinity: Part One (#20.1)} and Lord Ravensworth in "Doctor Who" {The Mark of the Rani: Part One (#22.5)} .
Appeared as a butler in the rock and roll movie "Born to Boogie" featuring Marc Bolan and T. Rex, and directed by Ringo Starr.
At the age of 80 in 2004, he became the oldest actor to ever play the "Doctor Who" character the Doctor, which he did (for the second time) in the Big Finish audio drama "A Storm of Angels".
He was considered for the roles of Fallada, Dr. Armstrong and Sir Percy in Lifeforce .
He died only seven days after his Casino Royale co-star Daliah Lavi.
Trained as an R.A.F.air-crew radio operator during the war but by the time his training was complete there were sufficient crews so he worked in orderly rooms and helped with entertainment.
