As of the second episode of RID2015 Peter Cullen has voiced Optimus Prime in 140 episodes. This is if we are not counting Season 5 and Generation 2 to count as anything. Gary Chalk voiced Optimus Prime for 153 episodes in the Unicron Trilogy. So in another 13 episodes Peter Cullen will tie Chalk. Of course Peter Cullen has voiced Prime in more movies and video games. But Gary chalk did more episodes still as Primal for the Beast Era. Peter Cullen G1: 68 Prime: 58 Rescue Bots: 18 (S4E4) Rid15: 13 (episode 39) Gary Chalk Armada: 51 Energon:50 Cybertron: 52 What are your thoughts of the amount of episodes they lent their voice to Optimus Prime? Just an interesting fact for anyone. Also lets keep anything after episode 2 of RID2015 out here please.