Transformers: Prime

Season 2, Episode 15

Episode Title: Toxicity

Air Date: 2012-05-26

Overview:

Bulkhead, on mission for the fourth relic, came back in critical condition via ground bridge. What happened?!? One epic showdown as Bulkhead and Hardshell go head-to-head in the ongoing quest to gather the last of the Iaconian relics on Earth.