Doctor

This article is about the Generation 1 character. For the Revenge of the Fallen character, see Scalpel (ROTF).

Doctor is somebody from the Generation 1 continuity family.

Doctor is a being whose existence is indicated in radio wave communication. He is presumably concerned about the Daleks.

Fiction

Starscream flew over the English countryside, picking up transmissions involving, among other things, Doctor. To a Power Unknown!

"Doctor" is, of course, the Doctor, the main character of the long-running British science-fiction programme, Doctor Who. Starscream is probably picking up one of the Colin Baker episodes. But...
...the Doctor has twice encountered Death's Head in the Doctor Who Magazine comic strips, and a third time in the The Incomplete Death's Head miniseries. And there's potentially some Daleks in the Transformers world...