Three's A Crowd

Bulkhead and Isaac Sumdac try to rebuild the Space Bridge that Megatron had built. When Bulkhead convinces the Constructicons to help out, a combination of a forklift, a Headmaster unit and an Allspark fragment gives birth to Dirt Boss. Meanwhile, the others track down any remaining Decepticons and run into Lugnut. Dirt Boss, having the ability to control other bots due to a mind-control drill, uses it to make Bulkhead go on a rampage. Optimus and the others come to help, leaving Lugnut alone. The end result is the Constructicons being transwarped to Dinobot Island, and Lugnut being freed and befriended by Ramjet