When Barney’s father arrives at the hotel, Barney devises a plan that makes Robin very nervous. Meanwhile, Ted is convinced someone framed him by messing up a wedding-related duty.
As Derek prepares for his move to DC, Meredith keeps herself busy at the hospital. Meanwhile, Jackson and April deal with difficult news, and Arizona and Amelia discuss how to best approach Dr. Herman.
After investigating the murder of a retired Master Sergeant, the NCIS team uncovers a fraudulent charity that preys on those searching for missing military personnel. Meanwhile, Bishop agonizes over the results of her probation evaluation.
When BCPD's police dog, Cookie, sniffs out a stash of heroin in a young girl's backpack, Russ and Milt have competing theories as to where it came from and why she had it. Also, Jacocks travels to Detroit for a training seminar, with the ulterior motive of finding out why Milt was sent to Battle Creek.
Nicky, Ricky, Dicky, and Dawn's Lizzy Greene, Casey Simpson, and Kyla-Drew Simmons team up with their superfans to party pupu piñata-style, send some gross spiders home, and break a Hawaiian curse.
