Release Message:  The medical center mounts a defense against alien forces trying to take the comatose Doctor (Tom Baker) while clones of Leela and the Doctor go microscopic so they can hunt down the intelligent infection that's in his head.

Description:  The medical center mounts a defense against alien forces trying to take the comatose Doctor while clones of Leela and the Doctor go microscopic so they can hunt down the intelligent infection that's in his head.