Watch the complete story of The Ark in Space – a Fourth Doctor adventure from 1975. Subscribe to Doctor Who: Classic for more full episodes: https://bbc.in/DWClassicSubscribe
The Doctor, Sarah and Harry arrive on a deserted space station in the distant future. They discover that it contains the entire population of Earth in hibernation who have not reawakened when they should have done because of a fault in the computer. In the meantime, the station has been invaded by the Wirrn, a large insect like creature who have other plans for the sleeping humans…
First Broadcast between the 25th January – 15th February 1975
Starring Tom Baker as the Fourth Doctor alongside Elisabeth Sladen (Sarah Jane Smith) and Ian Marter (Harry Sullivan)
CHAPTERS:
00:00:00 Episode 1
00:24:58 Episode 2
00:49:52 Episode 3
01:13:58 Episode 4
WATCH MORE:
Compilations: https://bbc.in/DWCompilations
Regenerations: https://bbc.in/DWRegenerations
Title Sequences: https://bbc.in/DWTitleSequences
The Whoniverse Show: https://bbc.in/TheWhoniverseShow
Official Podcast: https://bbc.in/DWOfficialPodcast
MORE ABOUT DOCTOR WHO:
Welcome to the Doctor Who: Classic channel! Travel in the TARDIS with full episodes dating back to the Doctor’s first incarnation. See the Doctor meet the Daleks and Cybermen for the first time, watch all of their regenerations and relive friendships with companions like Sarah Jane Smith, Ace and many more.
#DoctorWho
This is a commercial channel from BBC Studios. Service information and feedback: https://www.bbcstudios.com/contact/contact-us/
Watch the Doctor Who: Classic channel! Travel in the TARDIS with full episodes dating back to the Doctor’s first incarnation on SloppBoxx.Com.

















































5:34 it wouldn’t be a Sarah Jane episode if she wasn’t unconscious at least once
Time is immaterial… well, it was until Harry opened the cover and started touching that guys face
Raise your hand if you were traumatized by bubble wrap as a kid watching this.
Watched this with my older brother in the early 80s and so much imprinted on me. Now it’s 2026…
Dr Who on PBS reruns early 80s. Loved it. Tom Baker was always my favorite Dr.
In reality, little is known about Madame Nostradamus’ specific personality or hobbies, and the famous scarf was actually a prop designed by costumer James Acheson and knitted by a woman named Begonia Pope.
Madame Nostradamus (born Anne Ponsarde Gemelle) is known as both a witty person and a knitter, but this reputation comes from the lore of the sci-fi series Doctor Who rather than historical fact.
Actually Harry, the correct term is Musculus pectoralis major sinister (Left). It wouldn’t do to inject over the right (dexter) pectoralis major!
1:30:36 He used to be Jeff Goldblum 🤔