Grig

Grig was a Therovian who was sent on a mission by the President of Theros to find a cure for the disease afflicting his people. A meteorite storm forced his ship down onto a barren asteroid, where he was discovered by the Doctor, John and Gillian. They helped him repair his ship, narrowly escaping the dinosaur-like creature that attacked it, and returned to Theros, where they learned from Wopan that a cure for the plague had been found on Ixon. They traveled there, collected it and returned with it, saving the Therovians. Grig then returned his new friends to the asteroid where the Doctor's TARDIS had been left behind. (TVC: [[The Therovian Quest)