The Last Weekend (2012)

S3E1 The Five Faces of Darkness (1)

As the Autobots celebrate their hard-won triumph, a group of mysterious attackers seizes Ultra Magnus, Kup, and Spike. An alien informs the Autobots, leading them to suspect that the Decepticons are behind the abduction. However, upon reaching Charr, they discover the Decepticons are in no condition to orchestrate such a kidnapping, revealing that a different force must be at play.