Season 10, Episode 4 | 6 parts | First broadcast: 7 April – 12 May 1973 | Writer: Terry Nation | Director: David Maloney
Cast
- Jon Pertwee as the Doctor
- Katy Manning as Jo Grant
- Bernard Horsfall as Taron
- Prentis Hancock as Vaber
Summary
Following the Master’s trail to the jungle planet Spiridon, the Doctor and Jo uncover a massive hidden Dalek army being readied for a full-scale invasion of the galaxy, protected by an invisibility technology harvested from the planet’s native Spiridons. Joining forces with a small band of Thal resistance fighters, the Doctor must destroy the Dalek force before it can be unleashed.
Interesting Facts
- This serial directly continues the plot of Frontier in Space, forming the second half of a rare two-part epic within the Pertwee era.
- Writer Terry Nation revisits the Thals, the Daleks’ historic enemies first introduced in the earliest Dalek story from 1963, tying the tale into the series’ deep history.
- The story’s army of thousands of Daleks was achieved through a combination of full-size props, small-scale models, and clever camera tricks.
- It was among the last classic-series stories to heavily feature the Daleks until the character’s next major return several years later.
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