The Decepticons acquire the key that will give them access to Vector Sigma. After using Vector Sigma, they find the key is also capable of making organics turn into machines. Megatron prepares to use it against Earth and the Autobots will need new allies in this battle, but their creation will come at a high price.
Elenco: Frank Welker , Peter Cullen , Jack Angel , Corey Burton , John Stephenson , Dan Gilvezan , Casey Kasem , Don Messick , Scatman Crothers , Brad Garrett , Aron Kincaid , Ed Gilbert , David Mendenhall , Hal Rayle , Jim Cummings , Neil Ross , Morgan Lofting , Peter Renaday , Regis Cordic , Victor Caroli , Michael Bell , Gregg Berger , Arthur Burghardt , Ken Sansom , Chris Latta , Clive Revill , Michael Horton .