They are best known for their roles as the Doctor (from Doctor Who), and Trillian (from The Hitchhiker's Guide to the Galaxy), respectively.
Darren currently works as a consultant for the Double Exposure family of conventions- currently four (Metatopia, Dreamation, Dexcon and First Exposure) and has a supplement for the Doctor Who – Adventures in Time and Space: The Roleplaying Game featuring the Fifth Doctor in the work for Cubicle 7.
Duane confirmed that a character briefly seen in a cameo is the Fifth Doctor from the series Doctor Who.
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Later he became the second actor to portray the villain Omega (the first being Stephen Thorne): Collier portrayed Omega in the Fifth Doctor serial Arc of Infinity and later in the Big Finish Productions audio drama Omega.
He has appeared in the The Tomorrow People, Dalek Empire, 2000 AD, Sarah Jane Smith, Bernice Summerfield and Luther Arkwright plays, but is best known for his various appearances in the Doctor Who range, most notably as the companion Shayde in the Fifth Doctor play No Place Like Home.
Checking out the systems, the Doctor passes someone else doing the same thing: his fifth incarnation (Peter Davison)!
The Fifth Doctor comic stories is a collection of the offscreen adventures of the fifth incarnation of the Doctor, the protagonist of the hit sc-fi series, Doctor Who.
This is the first play to feature the Fifth Doctor, Adric, Nyssa and Tegan together, as Matthew Waterhouse was not willing to perform for Big Finish at the time.
The Fifth Doctor's sequence in the novel The Eight Doctors – featuring the Eighth Doctor going through his own past to meet and assist his other selves – takes place after this episode, the Fifth Doctor travelling to the Eye of Orion to continue their earlier holiday only to be attacked by a renegade Time Lord from the Eighth Doctor's era using the Timescoop, forcing the two Doctors to defeat a Raston Warrior Robot and a Sontaran squadron.
Peter Davison was approached to reprise his role as the Fifth Doctor in July 2007, and accepted the role to impress his children.