Castle The Wild Rover (2009–2016) watch online HD

The corpse of Jimmy, a baker popular for cup cakes, is found in his industrial dough mixer. His apprentice, Todd, noticed someone in a vintage muscle car, before being sent away. The car was identified as belonging to Irish mob boss Robert 'Bobby S.' Shannon. After FBI agent Sam Walker tells the team that Jimmy was his informant, Ryan astounds everyone by revealing he had been undercover in that gang years ago. And, to save a friend, chooses to revive his alias, Fenton, and go back undercover.

This episode begins with a cupcake cake reading "Happy 99th" on the victim's table of baked goods. This is the 99th episode of Castle.

Esposito has trouble pronouncing the name Siobhan because of Gaelic spelling rules. This is an inside joke as actor Seamus Dever has a similarly peculiar Irish first name.

Title reference: "The Wild Rover" is a popular English-language folk song that has become most associated with Irish culture, and has been covered by numerous Irish artists.

When Ryan explains that he worked undercover in Narcotics before transferring to Homicide, he calls the situation complicated, to which Castle replies "I love complicated". In other episodes, "complicated" is not only how he and Beckett describe their romantic relationship, but for most of season four, it's how they both justify their individual reluctances in pursuing it. The adjective is also how Emma, Stana Katic's character in Truth About Kerry (2010) (which happens to be set in Ireland), describes her relationship with her fiancè.

Brian Letscher has a supporting role in this episode. In season seven, his older brother Matt Letscher has a recurring role as a mysterious covert agent connected to Castle's two-month disappearance.