Transformers Ongoing #21
- Publisher: IDW
- Written By: Mike Costa
- Art By: Brendan Cahill, Guido Guidi, Marcelo Matere
- Language: English
- Digital Release Date: August 17th, 2011
Two stories for the price of one, kicking off the "CHAOS" event!! In part one, Rodimus makes his triumphant return to Earth, and sets off the major events that will spin off into CHAOS. And in part two, Prowl begins his investigation... of Spike. This storyline will change TRANSFORMERS forever! No, really!