Third volume of episodes from the second series of the CGI-animated franchise in which the Autobots and Decepticons return to do battle once again. In this instalment, Bulkhead searches for the final Iacon relic as Megatron deploys his most vicious Insecticons led by Hardshell to stop him. However, they soon discover that what they are searching for is a threat to both the Autobots and Decepticons. The episodes are: ‘Triage’, ‘Toxicity’, ‘Hurt’, ‘Out of the Past’, ’ Recruit’, ‘The Human Factor’ and ‘Legacy’.