'Blue Bloods' Season 7 Episode 10 spoilers: Frank and his most outspoken critic work together for justice; Jamie finds himself in hot water in ‘Unbearable Loss’

After a brief hiatus, “Blue Bloods” returns this Friday with a highly charged episode that is also to touch on its fans’ emotions. In the tenth installment of Season 7, titled “Unbearable Loss,” a tragic loss turns a grieving father into a vigilante.

Frank (Tom Selleck) must forget about his strained relationship with a preacher, whose son got killed, in order to make sure that the murderer pays for his crime. “Chicago Med” actor Ato Essandoh appears to reprise his role as Rev Darnell Potter, who has consistently expressed his disagreement with Frank.

He joins other “Blue Bloods” characters who will appear prominently on the Dec. 9 run, including Erin (Bridget Moynahan), Danny (Donnie Wahlberg), Jamie (Will Estes), Officer Eddie Janko (Vanessa Ray), Det. Maria Baez (Marisa Ramirez), Henry (Len Cariou), Linda (Amy Carlson) and Nicky (Sami Gayle).

Spoiler alert! This update contains more "Blue Bloods" Season 7 spoilers. Read on at your own risk if you have not watched the latest episode.

According to TV Guide, Friday’s episode features Jamie, who finds himself in trouble after discovering that the mugger he shot in self-defence turns out to be the son of an NYPD officer. Meanwhile, Erin delves into the case of a convicted felon, who died during a prisoner transport van accident. She becomes suspicious when she notices that the victim’s injuries do not add up with the cause of his death. Elsewhere, the son of Frank’s most outspoken critic is murdered. Rev Potter and Frank have to set aside their differences to catch the killer.

CBS has posted a sneak peek of the Dec. 9 episode of “Blue Bloods” on its official site. In the trailer, Rev Potter turns emotional upon seeing his dead son. “Reagan you better do this right,” the preacher cries. Frank promises him, “We will bring your boy’s murderer to justice.” Later, a man is brought to the police station and Danny notices that the suspect looks like he was beaten. Danny appeals to Rev Potter, “You’ve got to work with us, not against us.”

“Unbearable Loss” is directed by David Barrett and written by Peter Blauner. SpoilerTV named other actors and actresses who will be seen in "Blue Bloods" Season 7 episode 10, such as recurring “Blue Bloods” characters Tony Terraciano (Jack Reagan), Andrew Terraciano (Sean Reagan), Abigail Hawk (Abigail Baker), Gregory Jbara (Garrett Moore), Robert Clohessy (Lt. Gormley) and Steve Schirripa (Anthony Abetemarco).

The upcoming run will also feature additional guest stars including Paul Castro Jr (Scottie Lloyd), Michael Michele (Lois Potter), Leon Outlaw, Jr (Michael Potter), Johnny Hopkins (Kenny Becker), Kachina Dechert (Katy Fontana), Myles Clohessy (Rick “Junior” Wolf), Sir Brodie (Ed Shabazz), Anthony Ordonez (Joey D), Bruce Mcgill (Big Rick Wolf), Caverly Stringer (Shoo Fly), Joe Sabatino (Billy Lloyd), Marc John Jefferies (Omar Davis) and Ahmad Castang (Dante Mickelwhite).

Find out what happens next on "Blue Bloods” Season 7, which airs in the US every Friday at 10 pm on CBS. In Australia, “Blue Bloods” airs on Thursdays, 10:30 pm on TEN.