"Nightmares" Season 3, Episode 7
Danny is called to the scene on Halloween night, when a man in a priest costume is attacked by a figure dressed as a skeleton. Detective Kate Lansing is assigned to help on the case and she recognizes the skeleton costume as the garb of Baron Samedi, a Haitian spirit of death. With the suspect's photo taken from video surveillance, they visit the Haitian temple and speak to a priestess who identifies the culprit as a young man named Toussaint Lazard. They track Lazard at his apartment but he throws a cross at Danny before escaping through the window. The cross bears the inscription of a priest's name, leading them to believe Lazard was targeting this man instead of the victim who was dressed as a priest. They find Father Fran Ainsworth, the owner of the inscribed cross and an exorcist who had repeatedly tried to help the troubled Lazard. Danny and Kate locate Lazard at the Haitian temple and arrest him as he convulses violently. Danny has suspicions that Lazard was actually possessed while Kate believes he was on hallucinogens. Meanwhile, Frank helps Garrett avoid resignation when he becomes the target of extortion and Jamie becomes invested in helping a volatile mental patient. Jackie decides to take a leave of absence.
"Higher Education" Season 3, Episode 8
Danny and Kate arrive at a college campus to find a drug dealing student shot in the head execution style. Because the crime is narcotics related, narcotics Detective Eddie Stone is assigned to work with them and there is a lot of tension between them. After a staged drug buy has them bust another student dealer, she leads them to well-known drug dealer Otto Jackson, but they soon find out that she was covering for the real killer, a supplier who is a professor at the college. Meanwhile, Erin is fighting with Nicky about going to a college party but eventually lets her go when Frank won't back her up. Meanwhile, Jamie also has a life crisis when he reconnects with a former law school classmate who works on Wall Street who is beaten up when trying to give out supplies to the homeless...
Tom Selleck as Frank Reagan
Will Estes as Jamie Reagan
Donnie Wahlberg as Danny Reagan
Len Cariou as Henry Reagan
Jennifer Esposito as Jackie Curatola
Nicholas Turturro as Sgt. Anthony Renzulli
Amy Carlson as Linda Reagan
Sami Gayle as Nicky Reagan-Boyle