On a distant prison planet, a jailbreak takes place. One of the prisoners manages to steal a space motorcycle and get away, eventually arriving on the same little planet on which the Robinson Family has set up camp. The prisoner, whose name is Creech, happens across Smith, and forces the doctor to switch clothing with him before running away. When the prison officials arrive, they discover Smith dressed in prison gear and assume that he is the escaped convict. Smith tries to explain the situation, but only manages to get himself in deeper trouble for helping Creech to escape.