WTTW broadcast the story into two parts, with the split taking place during episode three when Caldwell tells the Doctor that an attack on the IMC ship would be a slaughter. [source: ChicagoEpguides]

Outro: The Doomsday machine becomes the cynosure, and with good reason, implicit in its name. Who will gain control? Be with us next Sunday evening at 11 for the conclusion of "Colony in Space." [source: ChicagoEpguides]