(Kelsey Grammer): A rogue CIA official hunting all Transformers.
(voiced by Mark Ryan): A bounty hunter working for the mysterious "Creators".
(voiced by Frank Welker): A human-made drone reincarnated from Megatron.
(Stanley Tucci): The ambitious head of KSI who builds artificial Transformers.
(Mark Wahlberg): A single father and struggling inventor.
: The film is known for its massive-scale action, including a climactic battle across Hong Kong.