| "The Mutants (Part 4)" | |
|---|---|
| Series Doctor Who Season 9, Episode 18 | |
| File:Doctor Who 9.18 001.jpg | |
| Air date | April 29th, 1972 |
| Writers | Robert Holmes |
| Director | Derek Martinus |
| Producers | Derrick Sherwin |
| Starring | Jon Pertwee; Caroline John; Nicholas Courtney |
| Episode guide | |
| Previous "The Mutants (Part 3)" |
Next "The Mutants (Part 5)" |
"The Mutants (Part 4)" is the eighteenth episode of series ninth of the British science fiction television series Doctor Who and the 257th episode of the series overall. It is the fourth chapter of the "Spearhead from Space" serial and was directed by Derek Martinus and written by Robert Holmes. It first aired on BBC One on April 15th, 1972.