Story Order
- Story 77 from Doctor Who
- Story 3 of 5 from Season 12
Episodes
![](/content/images/doctorwho/1975-02-22-the-sontaran-experiment-part-one/the-sontaran-experiment-part-one.jpg?v=2)
Doctor Who - The Sontaran Experiment - Part One
Arriving on Earth, the Doctor, Harry and Sarah meet a group of stranded human colonists.
![](/content/images/doctorwho/1975-03-01-the-sontaran-experiment-part-two/the-sontaran-experiment-part-two.jpg?v=2)
Doctor Who - The Sontaran Experiment - Part Two
Sarah has been captured by Styre who is conducting experiments on the captured humans.
Characters
Fourth Doctor
Sarah Jane Smith
Harry Sullivan
Vural
Krans
Erak
Styre
Roth
Zake
Credits
- Doctor WhoTom Baker
- Sarah Jane SmithElisabeth Sladen
- Harry SullivanIan Marter
- VuralDonald Douglas
- KransGlyn Jones
- ErakPeter Walshe
- StyreKevin Lindsay
- RothPeter Rutherford
- ZakeTerry Walsh
- PrisonerBrian Ellis