The Doctor goes all out to stop a Zygon-human war.
The Zygons
The shapechanging Zygons have had enough of living peacefully in human form for some...
The Doctor teams up with himself to solve the final mysteries of the Time...
The Fourth Doctor. "Terror of the Zygons," Final Episode.
The Fourth Doctor. "Terror of the Zygons," Episode Three.
The Fourth Doctor. "Terror of the Zygons," Episode Two.
The Fourth Doctor. "Terror of the Zygons," Episode One.
