Daniel Radcliffe and John Hamm appear in a bathtub together in the latest trailer for their new show “Young Doctor’s Notebook.”

In the British miniseries, Radcliffe and Hamm play younger and older versions of the same character.

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The four-part Sky Arts series, based on a Mikhail Bulgakov short story, tells of a doctor who comes to a rural village in the middle of the Russian Revolution, Perez Hilton reported.

It seems a little strange that “Mad Men’s” Hamm and “Harry Potter’s” Radcliffe are playing the same character since Hamm is 6 foot and Radcliffe is 5-foot-5, but it seems they will be able to pull it off considering Radcliffe plays a younger version of the character.

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The trailer opens with the actors awkwardly sitting in a bathtub together. After a few uncomfortable moments, the younger character asks for the soap.

The clip then cuts to Daniel Radcliffe’s character being dropped off in the snow by a horse and buggy. He first asks to be taken a little further, but is thrown to the icy ground.

When he finally settles in at his job, he needs to reassure the nursing staff that he actually is a doctor despite his youthful appearance.

The young, eager doctor says, “in we go,” while delivering a child. Hamm, the older version of the character, is shown in the background scoffing at his younger self.

He mutters, “Did I really used to look like that?”

The doctors exchange quick quips throughout the minute-long trailer.

British viewers can check out the miniseries when it premieres on Sky Arts 1 Dec. 6