Meet the Doctor, played by William Hartnell, who travels through space and time in his ship (the Tardis) along with his granddaughter Susan and two of Susan's schoolteachers.
Tom Baker continues as the Doctor in Season 14. His companion Sarah Jane Smith (Elisabeth Sladen) departs and is replaced by Leela (Louise Jameson).
From new lead writer and executive producer Steven Moffat, this BAFTA-winning series follows the adventures of the Doctor, the mysterious traveler who, with his human companions, journeys throughout all of time and space, facing a variety of foes and righting wrongs. This latest series, now in HD, sees Matt Smith's debut as the Doctor alongside a new traveling companion, the enigmatic Amy Pond (Karen Gillan). Together they explore sixteenth century Venice, France during the 1890s, and the United Kingdom in the far future, now an entire nation floating in space.
The Doctor returns, alongside newly weds Amy and Rory, to face monsters and mysteries and adventures all across time and space. Together they find themselves in sixties America, battling the invasion the world forgot, then aboard a pirate ship on the high seas of 1696, to solve the mystery of the Siren. In a bubble universe at the edge of reality, the Doctor meets an old friend with a new face.
The Doctor (Tom Baker) returns with his companions Romana (Lalla Ward) and Adric (Matthew Waterhouse).
Jon Pertwee is on board as the third Doctor in the series, travelling in his Tardis with his companion, Liz (Caroline John)
Join the Doctor, the Ponds and numerous friends on their latest escapades through space and time. The explosive season concludes with Amy and Rory's heart-breaking farewell - a race against time through the streets of Manhattan. Will the Doctor really lose the Ponds forever - there's only one way to find out...
Season 15 continues to follow the adventures of the Doctor (Tom Baker) and Leela (Louise Jameson), while it also introduces a new character, K9 (voiced by John Leeson).
David Tennant (Harry Potter movies) emerges as the regenerated Doctor Who in the second season of this updated sci-fi classic. In this new season catch the Doctor and Rose (Billie Piper) as they battle a cadre of cybermen, take on an army of ghosts and visit "the new Earth," among many other out-of-this-world adventures.
The Doctor (Colin Baker) and Peri (Nicola Bryant) return for more adventures in the Tardis.
Tom Baker continues as the Doctor in Season 17, along with his companion Romana (Lalla Ward) and K9 (voiced by David Brierley).
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