Director: John Rice, Pete MichelsWriter: Justin Roiland, Dan HarmonStars: Justin Roiland, Chris Parnell, Spencer GrammerSummary: Jerry invites his parents over for Christmas dinner with the family, but realizes that, in the time since he last saw them, they've developed a strange relationship with a boy named Jacob. Rick gives a homeless man named Reuben a "health check," and Morty is injected inside Reuben's body to fix an amusement park that Rick has built inside the man's body.