"The M.A.S.S. Device, Part 3: "The Worms" G.I. Joe 5 part mini series

The Joes and Cobra vie to find the heavy water element. Mysterious underwater tube worms cause both teams to agree to a cease fire to thwart off the worms, allowing both teams to successfully recover the heavy water. Snake Eyes struggles to remain alive in a snow storm and is suffering from radioactive poisoning. He manages to save a wolf (Timber) who becomes his makeshift pet. The pair are rescued by a blind hermit who cures Snake Eyes of his poisoning and injuries. The Joes are overjoyed to see their comrade alive and with the crystals. However, his canister was booby trapped by Cobra; causing poison gas to flood the air.