Mauvaise surprise

In an unknown location, Thrust listens to Sideways about the combined power of the Star Saber, Skyboom shield, and Requiem Blaster.
On Earth, most of the Autobots are on Starscream's case about his work ethic and not being a regular team player. He re-iterates he joined them to defeat Megatron. Optimus Prime tells Hotshot to first understand their differences with Starscream then procede from there.
The kids throw Starscream a surprise party as thanks for his souvenir Mars rock. They give him a hand-made polishing shammy, and he's humbled by their appreciation as he's never recieved a gift before.
Later outside, Thrust approaches Starscream and tells him to return to the lunar base with the Skyboom shield so they can conspire against Megatron (which is just a ruse). Starscream doesn't bite but the Autobots treat him like a (re-)traitor. Their accusations cause him to conclude the alliance as a failed experiment.
Amidst a Decepticon attack, Starscream tells Thrust he's staying with the

Next episode

S01E38 - La terrible menace