#1 - Deadlock 8.93
Season 3 - Episode 13
The fate of Earth hangs in the balance as the Autobots and Decepticons march toward their last stand.
#2 - Orion Pax (3) 8.69
Season 2 - Episode 3
Optimus begins to piece together his real identity using several clues (including Starscream referring to his as a "prime" -- whoops!), and eventually rebels against Megatron’s orders. Meanwhile, Optimus' Autobot pals hatch a risky plan to get their leader back.
#3 - Darkest Hour 8.66
Season 2 - Episode 26
Due to Megatron's crafty plan, Optimus must make a hard decision which could affect the whole Autobot team.
#4 - Regeneration 8.65
Season 2 - Episode 25
The Autobots and Megatron's Decepticons are drawn into Cybertron to face each other in a heroic battle over their mutual quests for the coveted Omega Lock, which, once unlocked with the four keys, would reawaken Primus'
#5 - One Shall Rise (1) 8.64
Season 1 - Episode 24
The Autobots discover that Dark Energon is responsible for Earth's recent natural disasters.
#6 - Convoy 8.63
Season 1 - Episode 9
The Autobots assist Agent Fowler in transporting an implosion device. But when a group of vehicles attacks them they are identified to be Humans and not Decepticons. The assailants are identified as M.E.C.H. led by Silas.
#7 - Sick Mind (1) 8.62
Season 1 - Episode 13
Optimus Prime becomes infected with a Decepticon plague and Arcee and Bumblebee must sneak aboard the Nemesis to find the formula for the cure.
#8 - Crisscross 8.59
Season 1 - Episode 17
Airachnid plots her revenge against Arcee and Jack by negotiating with Silas and M.E.C.H.
#9 - One Shall Rise (3) 8.58
Season 1 - Episode 26
While the Autobots continue their battle at the Earth's core, Jack learns more about Optimus' history on Cybertron.
#10 - One Shall Rise (2) 8.57
Season 1 - Episode 25
The Autobots team up with a surprising ally to save Earth.
#11 - Darkness Rising (5) 8.55
Season 1 - Episode 5
Through his Space Bridge, Megatron raises the dead Transformers of Cybertron, and summons them to Earth. The Autobots have to find a way to sabotage the Bridge, or else their new home will be destroyed by the legion of undead Decepticons.
#12 - One Shall Fall 8.54
Season 1 - Episode 23
When the Autobots learn of the Decepticons' plans to build a Space Bridge, Optimus decides to face Megatron once and for all.
#13 - Orion Pax (2) 8.53
Season 2 - Episode 2
Jack learns how to restore Optimus' memory.
#14 - Out of His Head (2) 8.52
Season 1 - Episode 14
In the continuing story from “Sick Mind”, Megatron has escaped his damaged body in the mind of Bumblebee.
#15 - Toxicity 8.50
Season 2 - Episode 15
Bulkhead, on mission for the fourth relic, came back in critical condition via ground bridge. What happened?!? One epic showdown as Bulkhead and Hardshell go head-to-head in the ongoing quest to gather the last of the Iaconian relics on Earth.
#16 - Stronger, Faster 8.50
Season 1 - Episode 22
Ratchet's devotion to the Autobots is tested when he believes that he has perfected the formula for synthetic Energon. But when Ratchet uses himself as the test subject, the synthetic Energon begins to alter his personality.
#17 - Operation: Bumblebee (2) 8.50
Season 2 - Episode 5
Bumblebee discovers that MECH and Starscream are responsible for his troubles; Ratchet confronts demons from his Cybertronian past.
#18 - Nemesis Prime 8.48
Season 2 - Episode 8
#19 - Alpha/Omega 8.48
Season 2 - Episode 21
The Autobots find out about the Omega Keys and their secret. Meanwhile, Megatron attempts to control the power of the Primes.
#20 - Legacy 8.45
Season 2 - Episode 20
Now that the location of the relics have been exposed by Orion Pax, the race is on to find the next one. New recruit Smokescreen and Jack are on the job with the Autobots looking to cut down Megatron before the beats them to it.
#21 - New Recruit 8.44
Season 2 - Episode 18
Optimus Prime and Megatron once again face each other in an epic battle for control over the Earth; the Autobots and Decepticons come across some clues that could have the potential to change the war and perhaps restore Cybertron. Starscream goes on a quest for Red Energon; a new Autobot joins Team prime.
#22 - Rebellion 8.44
Season 3 - Episode 4
Led by a new member, Team Prime launches a desperate assault on the Decepticon citadel.
#23 - Armada 8.43
Season 2 - Episode 10
Bulkhead is trapped on the Decepticon Warship and amid dual tries on Megatron's life.
#24 - Minus One 8.41
Season 3 - Episode 10
The Autobots capture Soundwave while Megatron decides to resurrect a former plan.
#25 - Evolution 8.41
Season 3 - Episode 9
Megatron doubts Predacon and its allegiance after Predacon reveals a secret of its own.