Doctor Who's Peter Capaldi will chase the Cretaceous period through Victorian London for the Twelfth Doctor's inaugural adventure.

The Time Lord and Clara (Jenna Louise Coleman) will touch down on the streets of London for the season 8 premiere. Titled "Deep Breath," the feature-length episode will see the newest regeneration reunite with the Paternoster Gang.

"When the Doctor arrives in Victorian London, he finds a dinosaur rampant in the Thames and a spate of deadly spontaneous combustions," reports the International Business Times. "Who is the new Doctor and will Clara's friendship survive as they embark on a terrifying mission into the heart of an alien conspiracy? The Doctor has changed. It's time you knew him."

While some lucky viewers have already seen the premiere, everyone else can get a first look with the newest preview (see video below). While a T Rex roars for all of London to hear, a mysterious monster causes mayhem and Clara disapproves of the Doctor's interior decorating skills.

Find out more when Doctor Who returns to BBC and BBC America on Aug. 23.

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Doctor Who, Television, BBC, BBC America