Transformers: Age of Extinction is a 2014 American science fiction action film based on Hasbro's Transformers toy line. It is the standalone sequel to Transformers: Dark of the Moon (2011) and the fourth installment in the Transformers film series. Like its predecessor, the film is directed by Michael Bay and written by Ehren Kruger. It stars Mark Wahlberg and Stanley Tucci, with Kelsey Grammer, Nicola Peltz, Jack Reynor, Sophia Myles, Bingbing Li, Titus Welliver, and T.J. Miller in supporting roles. It does not feature the original human cast from the previous three films, instead introducing a new human cast and as well as new Transformers, including the Dinobots. In the film, inventor Cade Yeager teams up with Optimus Prime and the surviving Autobots to investigate a manhunt involving Transformers for their hostility.