Transformers: Prime

Season 2, Episode 3

Episode Title: Orion Pax (3)

Air Date: 2012-03-03

Overview:

Optimus begins to piece together his real identity using several clues (including Starscream referring to his as a "prime" -- whoops!), and eventually rebels against Megatron’s orders. Meanwhile, Optimus' Autobot pals hatch a risky plan to get their leader back.