Impractical Jokers is an American hidden camera-practical joke reality television series that premiered on TruTV on December 15, 2011. It follows the four members of the comedy troupe The Tenderloins as they coerce one another into doing public pranks while being filmed by hidden cameras. The show differs from other prank television programs in that the stars of Impractical Jokers do not know the details of the prank until the moment they are performing it on strangers. While one cast-member performs the prank, the other three comedians in the troupe are behind the scenes feeding lines to their friend via microphone (with an earpiece). The lines fed to the prankster are meant to create a humorous and awkward exchange between the prankster and the stranger being pranked.