The struggle for control of the Kartz-Reimer time module, pursued by Chessene, the Sontarans, and the rogue Time Lord network, to manipulate time and dominate temporal research.

Chessene and Shockeye stand in the station’s galley, illuminated by the fading glow of the TARDIS’s departure. Chessene confirms an alliance with the Sontarans by promising them the Doctor’s TARDIS …

The Second Doctor and Peri maintain deceptive calm on the space station bridge as first contact with Sontaran battle cruisers approaches. Through an elaborate fishing charade, the Doctor fabricates an …