In this version Radius was played by Patrick Troughton who was later the second actor to play The Doctor in Doctor Who, None of these three productions survive in the BBC's archives.

The new instrument was constructed by Edward Troughton but Maskelyne did not live to see it completed.

In 1969, Pertwee was selected by producer Peter Bryant to take over as the Doctor from Patrick Troughton in the television series Doctor Who.

Patrick George Troughton ( 25 March 1920 – 28 March 1987 ) was an English actor most widely known for his roles in fantasy, science fiction and horror films, particularly in his role as the second incarnation of the Doctor in the long-running British science-fiction television series Doctor Who, which he played from 1966 to 1969, reappearing in 1973, 1983 and 1985.

Troughton was born on 25 March 1920 in Mill Hill, Middlesex, England to Alec George Troughton, a solicitor, and Dorothy Evelyn Offord, who married in 1914 in Edmonton, and had an elder brother, Alec Robert ( 1915 – 1994 ), and a younger sister, Mary Edith ( 1923 – 2005 ).

In 1948, Troughton made his cinema debut with small roles in Olivier's Hamlet, the TCF production " Escape " ( one of the stars of which was William Hartnell ), and a minor role as a pirate in Treasure Island appearing only during the attack on the heroes ' hut.

After he was cast, Troughton considered various ways to approach the role, to differentiate his portrayal from Hartnell's amiable-yet-tetchy patriarch.

Troughton was the first Doctor to have his face appear in the opening titles of the show, and one of six Doctor Who actors to play two roles in the same story when he appeared as Salamander in The Enemy Of The World ( the others being William Hartnell in The Chase and The Massacre of St Bartholomew's Eve, Tom Baker in Meglos, Peter Davison in Arc of Infinity, David Tennant in Journey's End, and Matt Smith in " The Rebel Flesh "/" The Almost People ").

Troughton was popular with both the production team and his co-stars.

Patrick Troughton was succeeded in the role by Jon Pertwee.

On Friday, 27 March 1987, two days after his 67th birthday, Troughton was a guest at the Magnum Opus Con II science fiction convention in Columbus, Georgia, USA.

Although he had been warned by his doctors before leaving the UK not to exert himself because of his heart condition, Troughton appeared to be in good spirits and participated vigorously in the day's panels, and was looking forward to a belated birthday celebration, which was planned for the coming Saturday evening, as well as a screening of the Doctor Who story The Dominators, which Troughton had requested personally, on the Saturday afternoon.

The species was moved in 1928 by Ellis Le Geyt Troughton, who created the genus Planigale for it and the other then-known species, the common planigale ( P. maculata ), and described the narrow-nosed planigale ( P. tenuirostris ).

In the 1970 BBC miniseries The Six Wives of Henry VIII, the role was played by Patrick Troughton.

In honour of Patrick Troughton the Mill Hill theatre was dedicated to the actor and named the Patrick Troughton Theatre in 2007.

There is a longstanding fan myth that the tape of Episode 1 was erased by mistake, having been confused with an episode of the Patrick Troughton serial The Invasion.

* Patrick Troughton does not appear in Episode 4 as he was on holiday when it was being recorded.

He also presented the Doctor Who video releases The Troughton Years ( showcasing selected surviving episodes of missing stories ) and The Pertwee Years ( a lookback at his time on the show, with his three selected episodes ) in the early 1990s.

Troughton found Doctor Whos schedule ( at the time, 40 to 44 episodes per year ) gruelling, and decided to leave the series in 1969, after three years in the role.

Troughton returned to Doctor Who three times after he originally left the programme, becoming the only former " Doctor " to reprise the role that many times on television after his original run.

Patrick Troughton ( who had played the Second Doctor and whom Davison had watched on the programme as a teenager ) had recommended to Davison that he leave the role after three years, and Davison followed his advice.

Troughton remained in the part for three seasons until 1969, eventually tiring of the workload of starring in a regular series.

He had been advised by Patrick Troughton to stay no longer than three years, and was also disenchanted with the quality of the scripts on the programme during the twentieth season.

Patrick Troughton, who played the Second Doctor, advised Davison to stay in the role for three years, and acting on this advice Davison informed producer John Nathan-Turner that he would leave the role after the 21st season.

He directed three stories during the Patrick Troughton years: The Moonbase ( 1966 ), The Tomb of the Cybermen ( 1967 ) and The Dominators ( 1968 ).

He is also one of only three directors ( the others being Douglas Camfield and Lennie Mayne ) who directed all of the first four actors to play the Doctor, William Hartnell, Patrick Troughton, Jon Pertwee and Tom Baker.

Many of the early episodes in which Troughton appeared were wiped by the BBC ( a full list of Doctor Who episodes missing from the BBC Archives is available here ).

* Sam Troughton ( son of David Troughton ) is an actor, known for Robin Hood.

She confirms that Hylas is dead and that Hercules is not to continue with the others, and directs them to seek the blind soothsayer Phineas ( Patrick Troughton ), whom they find tormented by two Harpies sent by Zeus to punish him for misusing his gift of prophecy ; these winged females would steal Phineas ' food leaving him only noisome scraps.

Troughton is a surname, and may refer to

The centre is staffed by a group of misfits including the bisexual Rose Marie ( Barbara Flynn ), self-absorbed Bob Buzzard ( David Troughton ), and decrepit Scot, Jock McCannon ( Graham Crowden ) who heads the team.

The present chairman of the trust which operates the Garden is Sarah Troughton, Lord Lieutenant of Wiltshire.

His second-in-command and partner is Egan ( played by David Troughton ) and the third member of the team is a relative newcomer named Saul ( John Wadmore ).

It features David Troughton as Sir Toby, and is notable for its multi-ethnic cast including Parminder Nagra as Viola and Chiwetel Ejiofor as Orsino.

The Tomb of the Cybermen is the first serial of fifth season in the British science fiction television series Doctor Who that originally aired in four weekly parts from 2 September to 23 September 1967 and is the earliest serial starring Patrick Troughton as the Second Doctor to exist in its entirety.

The Third Doctor Companion Chronicles story The Prisoner of Peladon is told by King Peladon, with David Troughton reprising his role for the first time.

David Troughton ( born 9 June 1950 ) is an English actor, known for his Shakespearean roles on the British stage and for his many roles on British television, notably that of Dr Bob Buzzard in A Very Peculiar Practice.

He comes from a theatrical family: he is the son of actor Patrick Troughton, elder brother of Michael Troughton, and father of both Sam Troughton and Warwickshire cricketer Jim Troughton.

# The image is being used for informational purposes about the character of the Second Doctor, as played by Patrick Troughton in the television programme Doctor Who ;

# The image is being used for informational purposes about the character the Second Doctor, as portraied by Patrick Troughton, visually depicting characteristics explained in the article ;

# The image is being used for informational purposes about the character the Second Doctor, as portrayed by Patrick Troughton, to illustrate his older appearance in the story The Two Doctors, which is the basis for the theory described in the Season 6B article ;