Tyrannosaur Junior is the son of Tyrannosaur Buck and Tyrannosaur Doe. He is first seen inside a cage captured by InGen. Sarah Harding and Nick Van Owen take him to the trailer to fix his broken leg, only to attract the parents. The parents take their child and come back to push the trailer off the cliff, Eddie Carr tries to help them, only to get eaten by the T-Rexes. He is later seen in San Diego where Ian Malcolm and Sarah use him as a bait to attract his father to the ship. Peter Ludlow goes to Junior but is later killed when the father tells his son to kill him. He is finally seen in Isla Sorna along with his parents, as this is the ending scene.

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