Starscream once again offers up his allegiance to Megatron, much to the displeasure of Dreadwing.
When Smokescreen is captured by the Decepticons, he uses the opportunity to find out the location of the Omega Key. Will this help him locate the other stolen keys?
Knock Out unlocks a new power that allows him to control sound. Meanwhile, Starscream activates the stolen Red Energon and gains super speed. Will the Autobots be able to fight against these new super-powered threats?
Megatron and Dreadwing head to Cybertron hoping to harness the power of the Primes by activating the Forge of Solus Prime. With their plan set in motion, the Decepticons hope to destroy Optimus Prime and the line of Primes forever.
While Jack pairs off with a new Autobot partner, Megatron tries to keep Optimus from discovering the existence of a legendary weapon of the Primes, which could turn the tide of the war.
Silas is given a new lease on life and approaches Megatron with a plan to join the Decepticon ranks.
After Hardshell's attack on Bulkhead, Miko and Wheeljack embark on a quest for revenge.
Bulkhead is faced with life-threatening danger during the last relic hunt.
Ratchet reluctantly calls upon Wheeljack for back-up in his mission to retrieve the third Iacon relic. Upon arriving at the location, the two Autobots are confronted by Soundwave, but they get a one-of-a-kind opportunity when Soundwave's minion, Laserbeak, is disabled.
Optimus Prime travels to Antarctica to hunt down the second relic, but while there he is confronted by Dreadwing and Starscream, and finds himself caught between shifting alliances.
Arcee and Bumblebee go deep into New York's "underground" in an attempt to beat Megatron to the next four lacon relics.
The Decepticon Warship threatens humanity, and Raf, Jack and Miko are the only ones who can stop it.
Bulkhead is trapped on the Decepticon Warship and amid dual tries on Megatron's life.
Agent Fowler has some explaining to do under the threat of military tribunal and Team Prime's termination.
M.E.C.H. unveils their latest creation: Nemesis Prime, an evil twin clone version of Optimus Prime.
Megatron sends Dreadwing, Airachnid and Breakdown to investigate the trail of a potential Energon source, but what Airachnid doesn't know is that Dreadwing and Breakdown have actually been ordered to kill her for her treachery. She eventually catches wind of this and fights her way off into the woods. Upon arriving at an abandoned Energon mine, Airachnid encounters Starscream cowering from a large Insecticon. After using her abilities to control the creature, she contacts Megatron and tells him to come to the mine, planning to use the Insecticon to kill him so she can claim Decepticon leadership.moreless
Wheeljack returns to Earth in pursuit of Skyquake's twin, the Seeker known as Dreadwing. Wheeljack is still upset over Dreadwing's involvement in the death of fellow Wrecker Seaspray.While Bulkhead is naturally excited about seeing his best friend again, Optimus Prime quickly becomes frustrated with Wheeljack's aggressive ways and complete disregard for civilians.moreless
Bumblebee continues to struggle with his role on the Autobots team.
Bumblebee starts to question his value to the team.
Optimus Prime rebels against Megatron and the Autobots try to get their leader back.
Jack learns from Vector Sigma how to restore Optimus Prime's memories.
With Optimus Prime having lost all memories of his life as a Prime and psychologically reverting back to his time before the war as Orion Pax, Megatron manipulates him into joining the Decepticons with the intention of using him to decipher records seized from Iacon. As the Autobots try to track Optimus Prime, Jack learns from Ratchet that the card key is connected to Vector Sigma and that they must find a way to get to Cybertron. They ultimately decide on using the Decepticon space bridge to return to Cybertron, but must locate it first. Starscream returns to theNemesisand manages to steal energon from the vault, but when a Decepticon walks his way, he hides in the closest room, where Orion is seen working. He immediately adresses him as Optimus Prime and aims his missiles at him.moreless