Mark Drop is a writer who scripted four episodes of Dinosaurs, beginning in the third season. For the fourth and final season, he was also story editor. He later wrote episodes of the Jim Henson Company animated series Dinosaur Train.
Drop had been a writer for The Arsenio Hall Show. After Dinosaurs, he wrote episodes of Herman's Head and a string of short-lived sitcoms, including Something Wilder (a vehicle for Gene Wilder), Cleghorne! (with Alaina Reed as a regular), and Goode Behavior (starring Sherman Hemsley).
Drop co-wrote the script for the 1996 video game Toonstruck (with Christopher Lloyd as an animator trapped in a cartoon world). After that, he shifted to writing for animation and children's television, including Recess, Lloyd in Space, Dave the Barbarian, Kim Possible, Danny Phantom, Johnny Test, the 2010 version of Pound Puppies, Jake and the Neverland Pirates, and Mickey and the Roadster Racers.