When Trek and Tristan find a bone in the schoolyard, Dan uses a paper-mache skull in Mrs. Hahn's art class to figure out if it came from the Stygimoloch.
Dan uses the art of disguise to get his Remote Dino Cam into a Triceratops nest but the real test comes when a T-rex threatens the safety of the babies.
While at the park with Uncle Jack, Dan finds a feather that he thinks belongs to a Dromaeosaurus. But, before he can prove it, his dog Doug goes missing.
Jim the Reptile Expert returns to Ms. Carver's class with a Chameleon promoting Dan to question if the Stegosaurus could change the colour of its plates.