Ep 11. The Devil Inside

In the Republic of Doyle season 4 episode 11, titled "The Devil Inside," the Doyle and Leslie families are getting ready for an engagement party between Des and Tinny, but things quickly take a dark turn when a couple is found dead in the woods. The couple has a connection to a local cult, and suspicions begin to arise that the cult may be responsible for the deaths.

Jake and Malachy are called in to investigate, and they soon find themselves delving into the dark world of the cult. Things get even more complicated when Christian and his father, a former cult member, become involved in the case. As the investigation continues, Jake and Malachy begin to uncover some disturbing secrets about the cult and its leader, leading them to believe that there may be more to these murders than initially meets the eye.

Meanwhile, Des and Tinny's engagement party is also marred by drama, as a jealous ex-girlfriend causes trouble and tensions rise between the Doyle and Leslie families. In the midst of all this chaos, Jake and Malachy continue to work tirelessly to solve the case, despite facing numerous obstacles and setbacks along the way.

As the episode comes to a close, the truth about the murders is finally revealed, and the Doyle family is left reeling as they grapple with the consequences of their investigation. "The Devil Inside" is a tense and thrilling episode that will have viewers on the edge of their seats as they try to uncover the truth behind these brutal murders.