List of Transformers Animated episodes

Season 1: 2007–2008

#	Title	Japanese title	Writer	Director	US airdate	Japanese Airdate	Production code
1	"Transform and Roll Out (Part One)"	新章! トランスフォーマー A New Chapter! Transformers	Marty Isenberg	Matt Youngberg, Yutaka Kagawa, Minoru Yamaoka, Makoto Fuchigami	December 26, 2007	April 3, 2010
Optimus Prime and his small crew of Autobots come into possession of the AllSpark, a powerful Cybertronian artifact that attracts the attention of their long-forgotten enemies—the Decepticons—and sends them crashing to a strange and distant planet known as Earth.
2	"Transform and Roll Out (Part Two)"	英雄、その名はオートボット The Heroes Are Called Autobots	Marty Isenberg	Matt Youngberg, Yutaka Kagawa, Minoru Yamaoka, Makoto Fuchigami	December 26, 2007	April 10, 2010
3	"Transform and Roll Out (Part Three)"	オールスパークの秘密 Secret of the AllSpark	Marty Isenberg	Matt Youngberg, Yutaka Kagawa, Minoru Yamaoka, Makoto Fuchigami	December 26, 2007	April 17, 2010
4	"Home Is Where the Spark Is"	不死身のメガトロン The Immortal Megatron	Michael Ryan	Matt Youngberg, Shunji Oga	January 5, 2008	May 8, 2010
The Autobots settle into their new home base, an abandoned automobile manufacturing plant, but the ancient assembly line machinery seems to have developed a mind of its own.
5	"Total Meltdown"	灼熱巨人の挑戦 Challenge of the Burning Giant	Rich Fogel	Matt Youngberg, Naoto Hashimoto	January 19, 2008	May 15, 2010
A bio-engineering genius experiments with some of Bumblebee's hydraulic fluid and accidentally transforms himself into Meltdown, whose corrosive touch can melt anything—including Autobots!
6	"Blast from the Past"	ダイノボット誕生！ Birth of the Dinobots!	Kevin Hopps	Irineo Maramba, Ben Jones, Kentaro Mizuno	January 12, 2008	May 22, 2010
Professor Sumdac upgrades a trio of animatronic dinosaurs from a local theme park, but the creatures develop minds of their own and become rampaging Dinobots, bent on destroying the Autobots.
7	"The Thrill of the Hunt"	ぬぐえない記憶 Don't Wipe Away the Memories	Andrew Robinson	Derrick J. Wyatt, Ben Jones, Shunji Oga	January 19, 2008	May 1, 2010
While the Autobots encounter a mysterious muscle car creating havoc in Detroit, Ratchet keeps flashing back to his "tour of duty" in the Great Autobot-Decepticon War.
8	"Nanosec"	罠の時間 Trap Time	Marty Isenberg	Matt Youngberg, Shunji Oga	January 26, 2008	May 29, 2010
Bumblebee's self-proclaimed title as "fastest thing on wheels" is threatened by Nanosec, a super speedster crook on a deadly mission that could destroy all of Detroit.
9	"Along Came a Spider"	クモ女の影 Shadow of the Spider-Woman	Marty Isenberg	Matt Youngberg, Irineo Maramba, Yutaka Kagawa	February 16, 2008	June 5, 2010
Bumblebee and Bulkhead's first Halloween turns even spookier when they encounter a giant spider that turns out to be the deadly Decepticon Blackarachnia.
10	"Sound and Fury"	音波大作戦 The Great Sound Wave Operation	Henry Gilroy	Ben Jones, Shunji Oga	February 23, 2008	April 24, 2010
Sari's new toy musical robot seems to have an evil streak—and the ability to control other machines—but Bulkhead is the only one who sees it.
11	"Lost and Found"	湖底の激戦 Fierce Battle at the Bottom of the Lake	Rich Fogel	Irineo Maramba, Yutaka Kagawa	March 1, 2008	June 12, 2010
The Autobots clash with Decepticons Lugnut and Blitzwing, who come to Earth searching for their missing leader, Megatron.
12	"Survival of the Fittest"	対決! ダイノボット Showdown! Dinobots	Steven Granat	Irineo Maramba, Makoto Fuchigami	March 8, 2008	June 19, 2010
Sari is kidnapped and the evidence points to the Dinobots. So Prowl and Bulkhead head to a mysterious island to investigate—with a highly suspicious Captain Fanzone on their tail.
13	"Headmaster"	ヘッドマスターをくいとめろ! Rein in the Headmaster!	Michael Ryan	Ben Jones, Shunji Oga	March 15, 2008	June 26, 2010
A disgruntled Sumdac employee seeks revenge and profit by taking control of one of the Autobots and sending him on a rampage.
14	"Nature Calls"		Todd Casey	Ben Jones, Bouakeo Thongkham, Shunji Oga	March 22, 2008
Prowl, Bumblebee and Sari get more than they bargained for when they head out to the remote woods to investigate a mysterious energy signal.
15	"Megatron Rising - Part 1"	メガトロンの復活 パート1 Megatron's Resurrection, Part 1	Marsha Griffin	Irineo Maramba, Ciro Nieli, Kentaro Mizuno	March 29, 2008	July 3, 2010
Prime begins to doubt his leadership abilities as the Decepticons mobilize for a big invasion of Earth.
16	"Megatron Rising - Part 2"	メガトロンの復活 パート2 Megatron's Resurrection, Part 2	Marty Isenberg	Ben Jones, Ciro Nieli, Shunji Oga	April 5, 2008	July 10, 2010
The Autobots are decimated by the Decepticon invasion, but still must rally to prevent the AllSpark from falling into their clutches.

Season 2: 2008

#	Title	Japanese title	Writer	Director	US airdate	Japanese Airdate	Production code
17	"The Elite Guard"	エリートガード Elite Guard	Rich Fogel	Matt Youngberg, Irineo Maramba, Yutaka Kagawa	April 12, 2008	July 17, 2010
The Cybertron Elite Guard arrives on Earth to retrieve the AllSpark and relieve Prime and his crew of their post, but they prove less than adept at blending in with the human world.
18	"The Return of the Headmaster"	ヘッドマスター, ふたたび! Headmaster, Once Again!	Michael Ryan	Ben Jones, Shunji Oga	April 19, 2008	July 24, 2010
Optimus Prime is forced to team up with his rival Sentinel Prime after Sentinel has a humiliating and potentially fatal encounter with the Headmaster.
19	"Mission Accomplished"	爆鎮完了! Blast-Extinguishing Complete!	Marsha Griffin	Irineo Maramba, Yoshio Chatani	April 26, 2008	July 31, 2010
Convinced there are no Decepticons left on Earth, the Elite Guard prepares to take Optimus Prime and his crew back to Cybertron, unaware of the increasing Decepticon activity taking place under their very noses.
20	"Garbage In, Garbage Out"		Marty Isenberg	Ben Jones, Shunji Oga	May 3, 2008
AllSpark energy turns a junk pile into a sentient robot who tries to help the Autobots, but ends up doing more harm than good.
21	"Velocity"		Len Uhley	Irineo Maramba, Christopher Berkeley, Kenji Itoso	May 10, 2008
Investigating a mysterious race car, Bumblebee gets involved with an illegal underground street racing circuit, which also captures the attention of the Decepticons.
22	"Rise of the Constructicons"		Stan Berkowitz	Ben Jones, Irineo Maramba, Shunji Oga	May 17, 2008
Bulkhead befriends a pair of construction vehicles brought to life by AllSpark energy. But the Decepticons have their scanners set on the duo for their latest construction project.
23	"A Fistful of Energon"		Andrew Robinson	Irineo Maramba, Matt Youngberg, Makoto Fuchigami	May 24, 2008
Prowl goes off on his own to capture the fugitive Starscream, but finds some competition in the form of a Decepticon bounty hunter.
24	"SUV: Society of Ultimate Villainy"		Dean Stefan	Irineo Maramba, Ciro Nieli, Shunji Oga	May 31, 2008
Aided by a mysterious benefactor, Detroit's B-level villains team up to take down the Autobots once and for all.
25	"Autoboot Camp"		Michael Ryan	Ben Jones, Christopher Berkeley, Shunji Oga	June 3, 2008
On the trail of an escaped Autobot traitor, Bumblebee flashes back to a previous encounter with the traitor when he first met Bulkhead in Autobot Boot Camp.
26	"Black Friday"		Rich Fogel	Derrick J. Wyatt, Irineo Maramba, Kentaro Mizuno	June 4, 2008
Blackarachnia enlists Prometheus Black, also known as Meltdown, to aid her with a dangerous experiment, while Prime and Grimlock are forced to team up to stop them.
27	"Sari, No One's Home"		Todd Casey	Irineo Maramba, Yutaka Kagawa	June 5, 2008
Left alone in the Autobots' home base, Sari must defend it against an intrusion by the Constructicons.
28	"A Bridge Too Close, Part I"		Marsha Griffin	Ben Jones, Christopher Berkeley, Shunji Oga	June 28, 2008
The Decepticons kidnap Bulkhead to aid in Megatron's ultimate plan to take over Cybertron.
29	"A Bridge Too Close, Part II"		Marty Isenberg	Irineo Maramba, Christopher Berkeley, Noboro Huruse	June 28, 2008
The fates of Cybertron and Earth lie in the balance as Optimus Prime and his Autobots battle Megatron and his Decepticons in a fight to the finish for the AllSpark.

Season 3: 2009

#	Title	Japanese title	Writer	Director	US airdate	Japanese Airdate	Production code
30	"TransWarped"		Marty Isenberg, Michael Ryan, Marsha Griffin	Matt Youngberg, Yoshio Frank Chatani, Tetsuro Moronuki, Yutaka Kagawa	March 14, 2009
As Sari and Dr. Sumdac deal with the fallout from her shocking discovery, the Autobots try to contact Cybertron to warn them of the traitor in their midst. Meanwhile, Megatron inadvertently stumbles upon a new plan to take over Cybertron, where an increasingly desperate Longarm attempts to cover his tracks.
33	"Three's a Crowd"		Rich Fogel	Kalvin Lee, Tetsuro Moronuki	March 21, 2009
Bulkhead seeks the help of the Constructicons for a vital construction project, but, thanks to their new leader, the Constructicons have bigger and deadlier plans.
34	"Where Is Thy Sting?"		Todd Casey	Kalvin Lee, Shigeharu Takahashi	March 28, 2009
A crazed Wasp finds his way to Earth to exact his revenge on Bumblebee... but he doesn't count on the Elite Guard following him.
35	"Five Servos of Doom"		Andrew Robinson	Kalvin Lee, Yoshio Frank Chatani	April 4, 2009
Sentinel Prime has incredible success capturing fugitive Decepticons, leading Prowl to suspect he's getting help.
36	"Predacons Rising"		Larry DiTillio Bob Forward	Kalvin Lee, Yutaka Kagawa	April 11, 2009
On the run from the Elite Guard, a fugitive Wasp finds his way to Dinobot Island, where his fate takes an even stranger and deadlier turn.
37	"Human Error, Part I"		Henry Gilroy	Kalvin Lee, Christopher Berkeley, Naoto Hashimoto	April 18, 2009
With the Christmas season upon them, the Autobots are not quite themselves following a run-in with Porter C. Powell's new mass-produced Soundwave action figures.
38	"Human Error, Part II"		Tom Pugsley	Kalvin Lee, Yosuke Hatta	April 25, 2009
While the Autobots are held captive by one of their deadliest foes, Sari must recruit a team of "Substitute Autobots" to rescue them.
39	"Decepticon Air"		Michael Ryan	Kalvin Lee Shigeharu Takahashi	May 2, 2009
The Decepticons aboard the Elite Guard ship decide to take down the Autobots that turned them in.
40	"This Is Why I Hate Machines"		Rob Hoegee	Kalvin Lee Yutaka Hirata	May 9, 2009
A space bridge accident sends Ratchet and Captain Fanzone to Cybertron, right as the Decepticon-controlled Omega Supreme arrives.
41	"Endgame, Part I"		Rich Fogel	Kalvin Lee Kentaro Mizuno	May 16, 2009
The Autobots race to find an advantage over Megatron's control of Omega Supreme.
42	"Endgame, Part II"		Marsha Griffin	Kalvin Lee Yoshio Frank Chatani	May 23, 2009
The Autobots fight to defend Detroit from Megatron and his clones of Omega Supreme.