Kevin was created as an animatronic amusement for the prehistoric planet setting of a vast resort complex. Possessed of an individual personality, he considered himself more of an actor than a simple automaton and was often concerned with attaining the proper "motivation" to portray his role effectively. When an invading Sontaran fleet caused a temporal rift to form in the complex, Kevin's T-Rex programming overcame him. He began attacking everything and everyone in sight, including the Doctor. His personality was eventually restored and he helped the Doctor restore order to the complex, allowing Rory to ride him as a mount to defeat the Sontarans.