Elyon (Dr. Who and the Daleks)

Elyon was a member of the Thal expedition to seek another way into the Dalek City via its water supply system. He was killed by a creature from the Lake of Mutations while filling the water bags. (TV: Dr. Who and the Daleks)

The Dalek Survival Guide indicated that this version of Elyon came from a version of reality "B" relative to the First Doctor's version of reality "A". (PROSE: Dalek Survival Guide)