Joshua Manning returns as Agent Caldwell to Zygon Century: Transformation

Joshua Manning returns to Dr Who spin off Zygon Century for the second volume as Agent Caldwell.

Produced by Big Finish and directed by Jonathan S Powell, Zygon Century explores a 100-year infiltration of Earth by the shape-shifting Zygons, starting in 1901. The second volume, Zygon Century: Transformation features three stories set across the 20th century where the Black Cadre shape-shifters plot to claim the planet, often facing the Third Doctor.