Season 2, Episode 5 | March 17th, 2012
Ratchet, still feeling guilty about failing to repair Bumblebee's voice box during the war, volunteers to give Bumblebee his own T-Cog via transplant. The resulting operation is interrupted, however, when an alarm signals the discovery of another relic from the Vaults of Iacon, a legendary hammer known as the Forge of Solus Prime. While Optimus Prime, Bulkhead and Arcee are out retrieving the hammer, Agent Fowler calls the base to inform the Autobots of newly discovered coordinates to a M.E.C.H. hideout. Seeing an opportunity, Bumblebee storms the M.E.C.H. hideout on his own to get his T-Cog back.