List of Prime episodes

Season 1: 2010-2011

#	Title	Writer	Director	Original airdate	Production code
1	"Darkness Rising, Part 1"	Duane Capizzi	David Hartman	November 26, 2010
After eliminating Cliffjumper, the Decepticons target Arcee and three humans become involved in the Transformer war.
2	"Darkness Rising, Part 2"	Nicole Dubuc	David Hartman	November 26, 2010
The Autobots attempt to rescue Cliffjumper, whom they believe to be alive, only to discover that the Decepticons have been experimenting on him with Dark Energon.
3	"Darkness Rising, Part 3"	Marsha Griffin	Todd Waterman	December 1, 2010
Optimus Prime and Ratchet investigate Megatron's plans with Dark Energon, while Agent Fowler is abducted by the Decepticons.
4	"Darkness Rising, Part 4"	Steven Melching	Shaunt Nigoghossian	December 2, 2010
The Autobots and the three kids rescue Fowler while Optimus and Ratchet continue fighting Megatron's Dark Energon zombies.
5	"Darkness Rising, Part 5"	Joseph Kuhr	Vinton Heuck	December 3, 2010
With Megatron's plan revealed, the Autobots attempt to stop him using the space bridge to send Dark Energon to Cybertron.
6	"Masters & Students"	David Slack	Todd Waterman	February 11, 2011
While Skyquake battles Optimus Prime, Starscream recovers the nearly dead Megatron.
7	"Scrapheap"	Marsha Griffin	Shaunt Nigoghossian	February 18, 2011
While Optimus and Arcee are trapped in the Arctic, the base is invaded by deadly Scraplets.
8	"Con Job"	Steven Melching	Vinton Heuck	February 25, 2011
Bulkhead awaits a visit from his buddy Wheeljack, but his arrival does not go as planned.
9	"Convoy"	Joseph Kuhr	Todd Waterman	March 4, 2011
The Autobots are attacked by a new foe while assisting Fowler with transporting the DNGS.
10	"Deus ex Machina"	Nicole Dubuc	Shaunt Nigoghossian	March 11, 2011
When Bulkhead makes a discovery in Greece, the race is on to recover an Energon Harvester before new Decepticon arrivals Knock Out and Breakdown get it.
11	"Speed Metal"	Dean Stefan	Vinton Heuck	April 9, 2011
Jack is drawn into the world of street racing to impress Sierra, and is aided by Bumblebee, but they encounter Knock Out as well.
12	"Predatory"	Marsha Griffin	Todd Waterman, Kirk Van Wormer (co-director)	April 16, 2011
When Arcee takes Jack on a routine mission, Airachnid turns up, putting him in danger.
13	"Sick Mind"	Steven Melching	Shaunt Nigoghossian	April 30, 2011
When Optimus is infected by a Decepticon plague, Arcee and Bumblebee sneak aboard the Nemesis to find a cure in Megatron's mind, but must race against Starscream and Knock Out's plot to euthanize the Decepticon leader.
14	"Out of His Head"	Nicole Dubuc	Vinton Heuck	May 7, 2011
As Starscream's rise to power climaxes, a vengeful Megatron takes control of Bumblebee's mind.
15	"Shadowzone"	Marsha Griffin	Todd Waterman	May 14, 2011
Starscream resorts to reviving Skyquake with Dark Energon, but his undead warrior is trapped in another dimension with the kids after a GroundBridge incident.
16	"Operation: Breakdown"	Steven Melching	Shaunt Nigoghossian	June 18, 2011
Bulkhead must swallow his pride if he is to rescue Breakdown when he is captured by MECH.
17	"Crisscross"	Joseph Kuhr	Vinton Heuck	June 25, 2011
Airachnid teams up with MECH to plot her revenge on Arcee and Jack, targeting Jack's mother, June.
18	"Metal Attraction"	Nicole Dubuc	Todd Waterman	July 9, 2011
As June's welcome at the Autobot base wears thin, Bulkhead and Arcee battle their respective nemesis' Breakdown and Airachnid for a magnetic weapon.
19	"Rock Bottom"	Tim Jones	Shaunt Nigoghossian	July 16, 2011
Starscream learns his place under Megatron the hard way when he is forced to rescue his leader when he is trapped in an abandoned Energon mine with the Autobots.
20	"Partners"	Mike Johnson	Vinton Heuck	July 23, 2011
Arcee lets her lust for vengeance cloud her judgement when the disgraced Starscream asks to join the Autobots.
21	"T.M.I."	Joseph Kuhr	Todd Waterman	August 7, 2011 (Canada) September 10, 2011 (U.S.)
Bulkhead is accidentally uploaded with the information from a data cylinder, which slowly kills him.
22	"Stronger, Faster"	Mairghread Scott	Shaunt Nigoghossian	August 14, 2011 (Canada)
Ratchet 'finalizes' the synthetic energon formula and uses himself as a test subject, but it ends up having some negative side effects.
23	"One Shall Fall"	Joseph Kuhr and Duane Capizzi	Vinton Heuck	August 21, 2011 (Canada)
A prophecy predicts dark times ahead, which Megatron intends to see through, leaving Optimus with one final option to stop him.
24	"One Shall Rise, Part 1"	Nicole Dubuc and Duane Capizzi	Todd Waterman	October 1, 2011
The Autobots discover that Dark Energon is responsible for an epidemic of natural disasters.
25	"One Shall Rise, Part 2"	Marsha Griffin	Shaunt Nigoghossian	October 8, 2011
Megatron offers his aid to defeat Unicron, but the Autobots are wary of such an alliance.
26	"One Shall Rise, Part 3"	Steven Melching	Vinton Heuck	October 15, 2011
Jack learns more about Optimus Prime's history on Cybertron as the Autobots and Megatron's joint battle to stop Unicron at the Earth's core comes at a terrible cost.

Season 2: 2012

#	Title	Writer	Director	Original airdate	Production code
27	"Orion Pax, Part 1"	Nicole Dubuc	Vinton Heuck	February 18, 2012
Megatron manipulates the impaired Optimus into joining the Decepticons, leaving the Autobots in disarray.
28	"Orion Pax, Part 2"	Mairghread Scott	Scooter Tidwell	February 25, 2012
The Autobots search for the Decepticon space bridge so they can send Jack to Cybertron.
29	"Orion Pax, Part 3"	Joseph Kuhr	Shaunt Nigoghossian	March 3, 2012
Jack and Arcee undertake a dangerous mission on Cybertron to access Vector Sigma, while Orion begins to rebel against Megatron.
30	"Operation Bumblebee, Part 1"	Marty Isenberg	Todd Waterman	March 10, 2012
Bumblebee questions his worthiness to his team after his most valuable asset is compromised.
31	"Operation Bumblebee, Part 2"	Nicole Dubuc	Vinton Heuck	March 17, 2012
While Ratchet confronts demons from the past, Bumblebee discovers that MECH and Starscream are responsible for his troubles.
32	"Loose Cannons"	David McDermott	Scooter Tidwell	March 24, 2012
Wheeljack and Dreadwing bring their battle of vengeance to Earth, much to the ire of Optimus and Megatron.
33	"Crossfire"	Marty Isenberg	Shaunt Nigoghossian	March 31, 2012
Airachnid leaves Megatron's command, and uses an Insecticon warrior to challenge the Decepticon leader.
34	"Nemesis Prime"	David McDermott	Todd Waterman	April 7, 2012
An apparent attack on Agent Fowler by Optimus Prime leads the Autobots to discover MECH's ultimate plan.
35	"Grill"	Duane Capizzi	Kevin Altieri	April 14, 2012
Agent Fowler has some explaining to do under the threat of military tribunal and Team Prime's termination.
36	"Armada"	Matt Wayne	Vinton Heuck	April 21, 2012
Bulkhead is trapped on the Nemesis amid dual attempts on Megatron's life.
37	"Flying Mind"	Robert N. Skir	Scooter Tidwell	April 28, 2012
The Dark Energon enhanced Nemesis gains sentience and threatens humanity, and Raf, Jack and Miko are the only ones who can stop it.
38	"Tunnel Vision"	Andrew Robinson	Shaunt Nigoghossian	May 5, 2012
Team Prime splits up to find the four Iacon relics, and Arcee and Bumblebee go deep into New York's "underground" in an attempt to beat Knock Out and an Insecticon to one.
39	"Triangulation"	David McDermott	Todd Waterman	May 12, 2012
Optimus Prime hunts for relics in Antarctica and finds himself caught between shifting alliances.
40	"Triage"	Marty Isenberg	Vinton Heuck	May 19, 2012
During the third relic hunt Ratchet and Wheeljack get a one of a kind opportunity when Soundwave's deployer Laserbeak is disabled.
41	"Toxicity"	Steven Melching	Scooter Tidwell	May 26, 2012
Bulkhead faces life-threatening danger on the final relic hunt while battling Insecticon Hardshell.
42	"Hurt"	Mairghread Scott	Shaunt Nigoghossian	August 24, 2012
Wheeljack and Miko come to terms with what happened to Bulkhead.
43	"Out of the Past"	Mike Johnson	Todd Waterman	August 31, 2012
Arcee and a friend discover that the Decepticons have developed a weapon that can destroy the Autobots.
44	"New Recruit"	Marty Isenberg	Vinton Heuck	September 7, 2012
A Decepticon escape pod lands on Earth and the Autobot Smokescreen emerges, while Starscream uses the Apex Armor to go on a quest for Red Energon.
45	"The Human Factor"	Robert N. Skir	Scooter Tidwell	September 14, 2012
After Silas is integrated into Breakdown's body, he approaches Megatron with a plan to join the Decepticon ranks.
46	"Legacy"	Marsha Griffin	Shaunt Nigoghossian	September 21, 2012
Jack tries to help Smokescreen fit in on Earth, while Megatron locates the Star Saber and tries to misdirect the Autobots.
47	"Alpha/Omega"	David McDermott	Todd Waterman	September 28, 2012
While Optimus is directed to find the Omega Keys by Alpha Trion, Megatron finds a way to use the Forge of Solus Prime and creates a sword of his own.
48	"Hard Knocks"	Mairghread Scott	Vinton Heuck	October 5, 2012
As the race grows more desperate, Knock Out harnesses the power of sound while Starscream gains the power of hyper speed.
49	"Inside Job"			October 12, 2012
When Smokescreen is captured, he learns the location of the Omega Key and attempts to retrieve all the other stolen keys.
50	"Patch"			October 19, 2012
Starscream proposes a truce between him and Megatron, which Dreadwing threatens to stand in the way of.
51	"Regeneration"			October 26, 2012
The quest for the Omega Lock continues when the Autobots and Decepticons battle on Cybertron.
52	"Darkest Hour"			November 2, 2012