| Sudden Mutation | |
|---|---|
| Doctor: | Second Doctor |
| Companion(s): | Malcolm Jennings, Fern Cooper |
| Main Enemy: | Dr. Spall's Experiment |
| Main Setting: | |
| Release Details | |
| Story Number: | 21 |
| Series: | 3 |
| Premiere Broadcast: |
20th June 2015 |
| Format: | 1x45 minute episode |
| Production Code: | 3.6 |
| Navigation | |
| The Souls of Dread | The Carnival of Fears |