The TARDIS lands in Renaissance Italy where Dr. Who becomes involved with nobility, sorcery and evil. Tom Baker. Count Federico: Jon Laurimore. Rossini: Antony Carrick.

The TARDIS lands in Renaissance Italy, where Dr. Who becomes involved with nobility, sorcery and evil. Tom Baker, Elisabeth Sladen. Count: Jon Laurimore. Rossini: Antony Carrick.

Rose finds her father (Shaun Dingwall) alive on a parallel Earth while a sinister plot against British society unfolds.

Dr. Who (Tom Baker) discovers a sinister interference with earthlings in suspended animation. Harry: Ian Marter. Sarah: Elisabeth Sladen. Vira: Wendy Williams. Noah: Kenton Moore. Rogin: Richardson Morgan.

Survivors of a shipwreck seek refuge at the lighthouse. Tom Baker, Louise Jameson. Vince: John Abbott. Reuben: Colin Douglas. Palmerdale: Sean Caffrey. Skinsale: Alan Rowe.

The Doctor arrives on Gallifrey, where he is accused of the assassination of the Time Lord President. Investigating with the aid of Co-ordinator Engin and Castellan Spandrell, he discovers that this is part of a plot hatched by his old adversary the Master.

On a strange planet, Dr. Who is taken prisoner by warring tribesmen. Calib:Leslie Schofield. Leela: Louise Jameson. Andor: Victor Lucas. Neeva: David Garfield.

The TARDIS materialises on Earth in the year 1911 inside an old priory owned by Egyptologist Marcus Scarman. Scarman has been possessed by Sutekh, last survivor of the god-like Osirans, who is held prisoner inside a pyramid in Egypt by a signal transmitted from one on Mars. Sutekh desires his freedom and instructs Scarman to construct servicer robots - which look like Egyptian mummies - to build a missile with which to destroy the Martian pyramid. The Doctor foils this plan by blowing up the missile.

With Cybermen on the streets of London, old friends unite against old enemies, and the Doctor takes to the air in a startling new role. Can the mighty UNIT contain Missy? As the Doctor faces his greatest challenge, sacrifices must be made before the day is won.

Science Goes to the Movies is a new monthly series, co-hosted by Faith Salie and Dr. Heather Berlin, that looks at the science in contemporary motion pictures. Guests are drawn from different scientific disciplines, illuminating scientific truths or imaginings in films like Interstellar, Birdman, The Theory of Everything, Into the Woods, and more. The series encourages lively and informative conversation about concepts, as well as film portrayals of scientists and scientific inquiry, asking if there is real science behind a story, or if a screenwriter made something up. Is science leading dramatic imagination, or does imagination create new science? Faith Salie is a television and national public radio host, political and pop culture commentator (CBS Sunday Morning), interviewer, journalist and actor. Dr. Heather Berlin is an American neuroscientist focusing on brain-behavior relationships affecting the prevention and treatment of psychiatric disorders. The hosts review and comment on the science presented in the story lines of current film and TV offerings. Salie brings a fun, educated and informed layperson's overview, while Berlin offers more in-depth analysis. Special guests join our hosts for a lively and informative conversation about pop culture and science. Science Goes to the Movies guest include Dr. Neil deGrasses Tyson (Astrophysicist), Ira Flatow (Science Journalist, Host of "Science Friday"), Dr. Rosario Gennaro (Cryptologist, Director, Center of Algorithms and Interactive Scientific Software (CAISS), Dr. Christof Koch (Neuroscientist, President and Chief Scientific Officer of the Allen Institute for Brain Science in Seattle), Gerard Ilaria (LCSW, Weill Cornell Medical College, Director of Operations, Headstrong Project), Derek Coy (Afghan Army Vet), Dr. Emily Rice (Astropysicist, Hayen Planetarium, American Museum of Natural History), Dr. Helen Fisher (Biological Anthropologist).

The final segment of the Key is traced to the planet Atrios, engaged in a long war with the neighbouring Zeos. The Marshal of Atrios intends a final strike to destroy the Zeons, but the Doctor and Romana discover that Zeos is deserted and the war is being co-ordinated by a computer called Mentalis, built by one of the Doctor's old Time Lord Academy friends, Drax..

The final segment of the Key is traced to the planet Atrios, engaged in a long war with the neighbouring Zeos. The Marshal of Atrios intends a final strike to destroy the Zeons, but the Doctor and Romana discover that Zeos is deserted and the war is being co-ordinated by a computer called Mentalis, built by one of the Doctor's old Time Lord Academy friends, Drax..

A group of astronauts returns from Mars with a peculiar problem: Their touch brings death.

Freddie needs a new coat for a "Doctor Who" fan-club event; Ash asks Freddie and Stuart for advice on winning back his ex-girlfriend; and Ash, Violet and Penelope make a shocking discovery during a shopping excursion.

Clara goes against an enemy that exists beyond human perception.