But it seems there was another element at work during production drunken pranks.

There’s a devil on Matthew and a funny mustache on Keri," Fields said.

And one of the assistants finally goes, ‘It’s Matthew.'"

GALLERY: 10 Best TV Episodes of 2016: THE AMERICANS Episode: “The Magic of David Copperfield V. The Statue of Liberty Disappears” Season 4, Episode 8 Air Date: Wednesday, May 4, 2016(l-r) Matthew Rhys as Philip Jennings, Keri Russell as Elizabeth Jennings

Matthew Rhys and Keri Russell on ‘The Americans’.Patrick Harbron/FX

“We had a boozy lunch,” Rhys said.

“And I was like, ‘New disguise options!'”

The pair recently reunited with theirAmericanscostar Margo Martindale for the filmCocaine Bearand are currently headlining their own TV projects.

Rhys headlines the HBO mysteryPerry Masonand Russell stars in the forthcoming showThe Diplomat.

EW’s Nick Romanoprofiled the ambitious endeavorin 2021.