Harwell Thompson serves as the main antagonist of the second episode of Joe Camp's 1983 short-lived TV series Benji, Zax & the Alien Prince.
He was portrayed by Ric Spiegel, who also played Zax and Circon.
Thompson is first seen when a group of kids make fun of him of what it is on the newspaper (a UFO).
As Zax notices the man in the photographed newspaper, he and Benji decide to follow him. As Prince Yubi arrives at his hotel, Thompson captures him.
As Verne takes a picture of him and Carolyn, Zax frees himself from the trashcan and Thompson captures him by turning him off.
As Darah and Khyber search for Thompson, Benji leads them to Thompson's room and when Thompson and the pair fight, Benji turns on Zax and Zax frees Yubi, causing the pair to lose the trio.