Sentinel Prime (Transformers One)

The Sentinel Prime of Transformers One (2024) is a completely different character from the Dark of the Moon version and is, by some distance, the most cynical villain the franchise has put on screen. Voiced by Jon Hamm, he is the ruler of Iacon: a beloved public figure, a war hero, the leader who supposedly lost the Matrix of Leadership defending Cybertron from the Quintessons, and who keeps the planet running by driving cogless miners into the energon shafts beneath the city.

The film's structure is a reveal. Orion Pax and D-16, two miners without transformation cogs, idolise him. What they find in the ruins above is the truth: Sentinel was never a hero. He betrayed and murdered the Thirteen Primes, sold Cybertron's energon supply and the Matrix to the Quintessons in exchange for power, and has spent centuries manufacturing a heroic public narrative on top of a mass grave. The energon crisis he presents himself as managing is one he caused.

What makes the characterisation land is Hamm's performance: Sentinel is charming, plausible and completely without inner conflict. He does not agonise. When confronted with what he did, he explains it as obvious. The film uses him to make its central argument, which is that D-16's transformation into Megatron is a direct product of discovering that the authority he trusted was a lie, and that Orion Pax's refusal to become the same thing is a choice rather than a temperament.

D-16 kills him personally, tearing his head from his body and throwing him off the edge of Iacon, and the murder is the moment Megatron exists.

Large, heavily armoured Cybertronian frame with a functioning transformation cog and considerable strength; comfortably outmatches Orion Pax and D-16 individually. His real power is political and informational: he controls Iacon's history, its energon supply and the narrative of the Quintesson war, and he can revoke transformation cogs, which is how he keeps the mining caste subjugated. Limits: he cannot fight the entire High Guard and the miners at once, and his authority collapses the instant the truth is broadcast.

• Orion Pax: an idol who becomes the proof that authority must be questioned, and whose exposure Orion chooses not to answer with murder.
• D-16: the miner whose faith in him is total and whose discovery of the truth turns him into Megatron; D-16 kills him personally.
• Alpha Trion: one of the Thirteen he betrayed, and the survivor who confirms the truth.
• The Quintessons: his secret patrons, to whom he sold Cybertron's energon and the Matrix.

Entirely distinct from every previous Sentinel Prime. Dark of the Moon's is a fallen mentor who betrays out of calculated desperation; Transformers: Animated's is a pompous rival played for laughs; IDW's is an authoritarian former leader. The Transformers One version is the only one whose entire public heroism is fabricated from the start.

Killed in Transformers One. D-16 tears his head from his body and hurls him from the heights of Iacon, the act that completes D-16's transformation into Megatron.

• Voiced by Jon Hamm, in a performance built on plausible charm rather than menace; the film's directors have described the casting as deliberately drawing on Hamm's Mad Men register.
• Transformers One (2024) was directed by Josh Cooley and is the franchise's first theatrical animated feature since The Transformers: The Movie in 1986.
• It is the first film to depict Orion Pax and D-16 as friends before the war, and Sentinel's betrayal is the mechanism the film uses to explain the Optimus-Megatron split.
• The character shares only the name with Dark of the Moon's Sentinel Prime and with Transformers: Animated's pompous comic-foil version; all three are separate characterisations.
• The transformation cog as a class marker, with the mining caste denied cogs entirely, is an invention of this film and has no precedent in earlier Transformers fiction.

Where the cartoon, the Marvel comics and the toy bios disagree, or where a popular claim does not hold up. We record these rather than smoothing them over.

• Transformers One sits in its own continuity and its relationship to the live-action films and to G1 has not been formally established, so whether this Sentinel is meant to be reconcilable with any other version is open.