Release Message:  With a killer Krynoid on the loose, the Doctor (Tom Baker), Sarah and the last surviving member of the expedition concentrate on hunting it down.

Description:  With a killer Krynoid on the loose, the Doctor, Sarah and the last surviving member of the expedition concentrate on hunting it down, unmindful of Chase's men who, once they learn of the second Krynoid pod (which always travel through space in pairs), work to obtain it and eliminate all possible witnesses.