Intro: Usually, a common cold is a minor inconvenience. Symptoms can be alleviated with aspirin and antihistamine. Tonight, the consequences of Dodo's cold assume far greater significance as we shall soon learn. Stay tuned now as The Doctor and friends take up temporary residence on "The Ark."

Outro: Exactly what happened in Tombstone, Arizona, on October 26, 1881? The Doctor, Steven and Dodo will find out next week when they meet "The Gunfighters." [source: ChicagoEpguides]