Bleytal

Bleytal was the leader of the Silurian Ark. He had begun a voyage to Earth in order to repopulate it with his people and dinosaurs, but misjudged the time.

He was either ejected from the ship by Solomon or died prior to the 24th century. (DW:  Dinosaurs on a Spaceship)

Behind the scenes

 * Richard Hope, who played Bleytal, previously played Malokeh in The Hungry Earth/Cold Blood and The Wedding of River Song.