Duh

Duh was a Rostrow engineer who was a member of a space mission led by Lahk. When their ship was unable to leave Birr, Duh was assigned to help the First Doctor make repairs. When he told the Doctor of their mission to gather plant specimens, the Doctor realised that the Rostrows had mistakenly taken some of the native Verdants prisoner, and in retaliation the Verdants were preventing the Rostrow ship from leaving. Duh accompanied the Doctor on the journey to the Verdants' leader, Phlege, to make peace with them, during which they narrowly escaped from Verdant executioners. With the misunderstanding resolved, the Rostrows were allowed to leave. (COMIC: Mission for Duh)