Decepticon Mook: Command, this is SpaceBridge Control! We are under attack! *Commlink static* *Punch* Ratchet: *holding radio jammer* Shhh.
Break the Cutie: Arcee when Jack says he admires getting to see another planet, which is her home world destroyed and stripped of all traces of civilization.
When wondering who is going to answer Breakdown's call, Ratchet expresses certainty his own voice would be recognized.
Can't Kill You, Still Need You: Optimus / Orion Pax still hasn't completed decoding Iacon, making Megatron impatiently and anxiously await the opportunity to terminate him once he's done, especially since Starscream crammed the words "Optimus Prime" right down Orion's ears while addressing the latter. The bad news for Megatron is that Orion is (secretly) choosing to put off Project Iacon so that he can decode Soundwave's barriers on the Cybertronian database records of Optimus Prime.
Captain Obvious: When Ratchet and Bulkhead ask Starscream for the current location of the Nemesis:
Starscream: It's a ship. It moves!
Curiosity Causes Conversion: Orion being called Optimus Prime by Starscream starts to help unravel all the Blatant Lies Megatron has been feeding him about Decepticons being freedom fighters and Autobots being the evil warmongers. In Part 3, Orion fully resigns from Megatron's command even before gaining back his memory.
Early-Bird Cameo: It's later revealed that the false "Optimus Prime" image in the Decepticon database was actually a picture of Ultra Magnus.
Even Evil Has Standards: To Agent Fowler's surprise, Decepticons do have a way of opening and closing conversations with each other on how their day is going.
Everybody Knew Already: When an injured Starscream tells Bulkhead and Ratchet about Optimus' current predicament, they already expected as much. While he is unable to disclose the Decepticon ship's exact location, he does reveal something new: the location of the Space Bridge project he supervised before he left.
Ghost Planet: While previous entries to the Transformers franchise show Cybertron as either occupied or barely livable, this version shows the planet as completely barren after eons of endless war, with no robots residing in it. Well... almost no robots.
Gone Horribly Right: Megatron kept Orion around because he was an expert archivist that can decrypt anything, including the Iacon files. Despite Megatron's best efforts to keep hidden, Orion starts getting into the Decepticon archives to find the truth that Starscream accidentally lets slip.
He Knows Too Much: Having been addressed as "Optimus Prime" by Starscream, Orion now has critical information regarding his missing identity. Megatron fears that this will lead to Orion choosing to rebel against the Decepticon cause, and tells Soundwave that they will need to pressure him into finishing Project Iacon before finally terminating him.
Hollywood Hacking: With a few keystrokes, Orion decrypts Decepticon information about Optimus Prime.
Idiot Ball: For some reason, it never occurs to Starscream that it would be incredibly helpful to tell Ratchet and Bulkhead that he reminded Orion Pax of his true identity as Optimus Prime.
The Informant: In exchange for medical treatment, Starscream offers to tell Ratchet everything he knows about the situation. To his surprise, Ratchet and Bulkhead already know about the reversion to Orion Pax. They're about to brush Starscream off, but him knowing the location of the Decepticon Space Bridge gets their attention.
Innocently Insensitive: Jack calling a destroyed, devastated Cybertron an incredible sight to see really brings down Arcee's spirits.
June points out that no one has even considered whether or not a human could even breathe on Cybertron. Fowler uses his contacts at NASA to get Jack a suit.
Ratchet and Bulkhead were evasive about Starscream being The Informant, but Arcee later acknowledges it was obviously him.
Mood Whiplash: With Ratchet's first attempt at creating a Space Bridge failing miserably, Raf attempts a Rousing Speech by talking about his struggles climbing the rope in gym class and how Bumblebee's faith convinced him to keep trying until he got it right. Ratchet questions what climbing a rope in gym class could possibly have to do with advanced technology he's trying to build. He later grasps what Raf was trying to safe and brings it up in conversation, only for Miko to have the exact same reaction he did.
My God, You Are Serious!: Starscream when realizing Optimus Prime truly believes himself to be Orion Pax and that Megatron has told him the gospel truth of what happened on Cybertron.
Orion Pax: You are not suggesting that our leader would speak... falsehoods? Starscream:(Beat) ... BWAHAHAHAHAHA! Oh, you really ARE being kept in the dark, aren’t you?
Nice Job Fixing It, Villain: It's ultimately Starscream who ends up reminding Optimus Prime of his identity and also had to de-bug Orion's mind of the lies Megatron told him.
Oh, Crap!: Once Ratchet, Bulkhead, and Bumblebee commandeer the Space Bridge, they get this when they hear Breakdown's voice demanding for a progress report. Bulkhead and Ratchet can't try to fake being Vehicon mooks since Breakdown would recognize their voices, and Bumblebee is obviously out of the question. In desperation to not blow their cover, they have Agent Fowler pretend to be a Vehicon.
In the same scene, the Autobots and humans both get this when Agent Fowler, still pretending to be a Vehicon, reflexively asks Breakdown how he is. They thought for sure their cover had been blown from that, but thankfully it went by without suspicion ("Never better.")
Right for the Wrong Reasons: Starscream told the Autobots he had information they needed. He thought it was the Optimus had gone with Megatron, and to his shock they already knew that. He did however have something else they needed to know; the location of the Space Bridge.
Save the Villain: To Ratchet's annoyance, he has to treat Starscream's wounds to get the location of the Decepticon Space Bridge so they can access the Key to Vector Sigma.
Shout-Out: Agent Fowler's conversation with Breakdown is reminiscent of Han Solo's conversation over the detention level comlink, though ironically it's a reference to a plan that didn't work. Here, it actually does.
The Stool Pigeon: Starscream gleefully tells all he knows for a few Band-Aids.
Tempting Fate: Just after Bulkhead comments that it will take time for Arcee and Jack to get back, Breakdown calls in to demand a status update.
To Be Continued: As Arcee and Jack continue the search on foot, they're stalked by an Insecticon.
Trying Not to Cry: June is struggling to hold back her tears when she recalls how Jack always wanted to be an astronaut when he was a kid, and is about to become one by going to Cybertron.
Orion Pax: You speak many riddles, Starscream. Please, tell me more of which you know. Starscream: And in return?
Later on, he gets shot down by Vehicons after trying to flee the Nemesis trying to steal Energon. Starscream contacts Ratchet for medical aid kit, but Ratchet refuses until Starscream exchanges valuable information on how the Autobots can get Orion off the ship.
