- Call Of The Primitives
- During a huge battle, all of the "primitive" Transformers are summoned to a
planet. An energy creature has been unleashed, and it drains the life energy of all the
other Transformers. Its creator, Primacron, was also responsible for Unicron and many of
the primitives, and his assistant believes that only the instincts of those Transformers
can stop the intellect of Primacron. All except Grimlock are defeated and he stops the
energy being who has betrayed Primacron by throwing the system into reverse.