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.
Casts:
Peter Cullen, Frank Welker, Richard Gautier, Jack Angel, Susan Blu, Corey Burton, David Mendenhall, Victor Caroli, Stan Jones, John Stephenson, Dan Gilvezan, Michael Bell, Neil Ross, Steve Bulen, John Moschitta Jr., Johnny Haymer, Jered Barclay, Stan Jones, Stephen Keener, Christopher Collins