Cassie's uncannily smart dog Jetson is transformed into a human following a misfire by Divatox's latest monster, Mr. Goorific. Bulk & Skull are hired to help find the missing dog. In human form, Jetson, calling himself Jethro, helps Cassie cope with the loss of her canine best friend and does his best to cheer her up. But with the monster and Elgar's repaired Terrorzord on the horizon, that happiness could be short lived...