Overview: Grunkle Stan's Lost Mystery Shack Interviews was a series of promotional ads aired during showings of Gravity Falls on Disney XD. The ads aired as part of a Gravity Falls marathon on June 28th, 2015 and were comprised of short, 30-second segments where a puppet version of Stan Pines, desperate for summer workers at the Mystery Shack, would give job interviews to stars from some of the channel's live-action sitcoms whose bus had broken down outside.