Transformers 4, the series' highest-grossing film, replaces Sam with Mark Wahlberg's Cade Yeager. Wahlberg has also since left the franchise leading to several spinoff movies taking place earlier ...

Cade Yeager, a "robotics expert", buys an old truck and upon examining it, he thinks it's a Transformer. When he powers it up, he discovers it's Optimus Prime. Later, men from the unit show up ...