The Hitchcock-inspired, off-Broadway comedy 39 Steps, now running at the Union Square Theatre, features a group of four actors portraying more than 150 characters. What happens when one of those actors is unable to make a performance? Enter the "Wonderstudies." Barrie Kreinik and Daniel Harray, two understudies from the cast of 39 Steps, take us through a day in their hectic lives in the YouTube video below. Check out what it takes to join their wondrous ranks as some of the hardest working folks in the biz.

For tickets to 39 Steps, click here.