Terror of the Zygons

The Doctor is summoned to Scotland, where UNIT is investigating the destruction of some oil rigs in the North Sea. The evidence suggests that the platforms were destroyed by a gigantic sea creature, but that's only the tip of the iceberg. Harry gets captured by shape-shifting aliens, the Brigadier gets gassed and Sarah is nearly suffocated. The Zygons have begun their conquest of Earth and only the Doctor stands in their way. Terror of the Zygons definitely shares some DNA with serials like Doctor Who and the Silurians and The Sea Devils but it still manages to be an entertaining adventure. The Zygons are well designed and their use of organic technology is both clever and gross. At the end of the serial, Sarah and the Doctor leave Scotland in the TARDIS while Harry chooses to stay behind on Earth, ending his time as one of the Doctor's companions.

 

Rating: Sounds like the Brigadier%