To date, Patrick Troughton has been the only actor to reprise the role of the Doctor in three specials.
Troughton is the only actor to play his own "evil" twin in the Doctor Who Series. In the episode Enemy of the World he plays both the Doctor and his nemesis, the evil Salamander.
When William Hartnell regenerated into Patrick Troughton, Troughton was seen briefly at the end of Doctor Who: The Tenth Planet Episode 4.
Patrick Troughton's favourite role was playing the Second Doctor in Doctor Who.
Troughton died while at a convention in Georgia in the United States in 1987.
Pat Troughton was loved by the cast and crew of Doctor Who.
Advised Peter Davison (The Fifth Doctor) to limit his stay as the Doctor to 3 years so he wouldn't be typecast. Troughton and Davison became good buddies.
Enjoyed The Five Doctors so much that he requested to come back in the future. He starred alongside Colin Baker in The Two Doctors in 1985.
Patrick has six children: Joanna, Jane, David, Michael, Peter and Mark.
His favourite role was Daniel Quilp in "The Old Curiosity Shop" (1962)
In 1948, Troughton appeared in the TCF production "Escape" co-starring with William Hartnell, who he would later take over the role of the Doctor from.
On the set of Doctor Who, Patrick was popular with both his fellow cast and crew. A producer once commented he had a "leading actor's temperament. He was a father figure to the whole company and hence could embrace it and sweep it along with him."
Once told Peter Davison (The Fifth Doctor, Doctor Who) that he should only play the part of the Doctor for three years, so as not to be typecast. Peter followed that advice and left the show in 1984, after a three year stint as the Doctor.
Although his health was failing him, Pat also continued to smoke heavily during his final years. This was a contributing factor is his early death, according to his doctors.
His grandson, Harry Melling plays Dudley Dursley, Harry Potter's mean-spirited cousin in Harry Potter films.
Patrick starred as Robin in the 1953 Robin Hood TV series. In 2006 Patrick's grandson, Sam Troughton, stared as Much in the BBC remake of the same name.
He had the dubious distinction of playing the first character to be murdered in the popular detective series "Inspector Morse" (1987).
He was an excellent swordsman.
Once claimed his favourite role on television had been Daniel Quilp in "The Old Curiosity Shop" (1962)
Enjoyed reading philosophy and comparative religion.
He performed in regional repertory and with the Bristol Old Vic, the BBC Repertory Company and on the stage at London's West End.
On March 27, 1987, Troughton was a guest at the Magnum Opus Con II science fiction convention in Columbus, Georgia.
In 1986 he appeared in the ITV sitcom The Two of Us, and his final television appearance was as a guest star on Supergran.
He suffered two major heart attacks in 1978 and 1984.
Troughton's health was never that robust and late in his life he apparently refused to accept his doctor's advice that he had developed a serious heart condition through overwork and stress.
His grandson, Jim, plays professional cricket for Warwickshire.
Troughton's sons, David and Michael, are both well-known actors on stage and screen.
Patrick was a versatile and prolific British actor.
His full name is Patrick George Troughton.
He appeared in all 3 multi-Doctor stories The Three Doctors, The Five Doctors and The Two Doctors.
Patrick Troughton: (On playing the Doctor) It was the happiest time of my professional life.
Patrick Troughton: (On playing the Doctor) How did I feel about taking on the role? To begin with, I thought it would last about six weeks after Billy Hartnell had finished. My children and I had been fans of the programme and I loved the way he had played the Doctor. But I knew I couldn't possibly do it like that.
Patrick Troughton: I've done a lot of swashbuckling in my time - ever since Joy Harington gave me my first real television chance in Kidnapped.
Patrick Troughton: I have been asked what impact the part of the Doctor had on my career and I can honestly say none. For luckily I got out in time before I was too typecast.
Patrick Troughton: If I had not been an actor I would quite like to have been a teacher. Children keep one young.
Patrick Troughton: Doctor Who gave me a chance to indulge my passion for dressing up and being able to have some sly fun as well as a bit of clowning.
Patrick Troughton: (On playing the Doctor) I had a Whale of a time!
Patrick Troughton: Oh my giddy aunt!
Pat Troughton: I think acting is magic. If I tell you all about myself it will spoil it.