Underground tackles a very serious subject, but sometimes the actors have to let loose!

ET has an exclusive sneak peek at the show's season two gag reel, giving fans a behind-the-scenes look at what goes into making the Civil War drama -- forgotten lines, laughter and all!

EXCLUSIVE: Aldis Hodge Talks 'Underground' Nude Scenes and Fanning Out Over Mahershala Ali

The clip starts off with a wayward ride on a carriage, before Jurnee Smollett-Bell and Aldis Hodge show off their funny sides while trying to get through some pretty intimate scenes. The greatest moment occurs when Hodge goes in for a romantic kiss with Smollett-Bell, before giving her character a scolding she wasn't expecting!

See a portion of the gag reel in the video player above.

The complete season two DVD set, which features a gag reel and deleted scenes, hits shelves on Tuesday, July 11. A limited edition with seasons one and two is also available that day.

EXCLUSIVE: How Jurnee Smollett-Bell Got Through the Toughest Scenes of ‘Underground’

Underground was canceled by WGN America in May, after just two seasons, and has yet to find a new home. See more on the series from executive producer John Legend in the video below.