Erik Dellums plays as Aaravos in How the Universe Works.
Erik Dellums is the top #1 member of the cast and appears in 27 episodes.

Michael Gregory Rowe (born March 18, 1962)  is an American television host and narrator. He is known for his work on the Discovery Channel series Dirty Jobs and the series Somebody's Gotta Do It originally developed for CNN. He hosted a series produced for Facebook called Returning the Favor in which he found people doing good deeds and did something for them in return. He also hosts a podcast titled The Way I Heard It with Mike Rowe. Rowe has narrated programs on the Discovery Channel, The Science Channel, and National Geographic Channel such as Deadliest Catch, How the Universe Works, and Shark Week. He has also appeared in commercials for firms such as the Ford Motor Company. In June 2020, Discovery Channel announced Dirty Jobs: Rowe'd Trip, a four-episode miniseries, to be aired in mid-July 2020, billed as "part reunion, part road-trip, part look-back-special".

Mike Rowe plays as Host in How the Universe Works.
Mike Rowe is the top #2 member of the cast and appears in 6 episodes.