By EW.com/Nick Romano
Updated Feb 07, 2018 @ 11:11 am

James Corden introduced Fifty Shades Freed star Jamie Dornan to a whole new world of pleasure: model trains.

In a spoof on the Fifty Shades movie franchise, the Late Late Show host took the actor inside his secret playroom, a place where few have ever tread. “It’s important that you know you can leave at any time,” Corden said a serious yet sultry voice. “I meant what I said,” he added, “a helicopter is on standby to take you anywhere you want to go.”

Then he unlocked the door and Dornan’s whole life changed.

“You’re a nerd?” he asked.

“I’m a hobbyist,” Corden clarified.

Things got heated when the late-night personality asked Dornan to “turn around,” after which he put on a bandana and train conductor hat. “Call me signal master,” he instructed.

RELATED: Jamie Dornan Reveals What He Was Really Wearing During Those Fifty Shades Sex Scenes

Of course, Dornan’s Christian Grey, a role he’ll reprise in this month’s Fifty Shades Freed, is a man of “singular” tastes. The actor will return opposite Dakota Johnson in the film trilogy’s final installment, out in theaters Feb. 9.

Watch the Fifty Shades spoof in the clip at top.