The BAU search for an UNSUB who is fascinated with disturbing medical experiments.
Jesse and Stella's band gig goes sour when they become the victims of a mass poisoning, becoming key witnesses in piecing together a deadly night at the pub.
The team investigates 2 house burglaries and find a common thread. Sarah and Rex hear troubling news about Charlie.
Monk* S8:E12
In an attempt to woo the lone holdout on the reinstatement committee, Monk accompanies the man's troublesome son and Randy's camping group - where they soon find themselves running afoul of some dangerous armored car robbers.
Monk* S8:E13
While investigating the death of a man found shot and burned beyond recognition, things begin to go horribly wrong for Stottlemeyer and his bride-to-be, causing her to have second thoughts.
Monk* S8:E14
At long last Monk finally receives his badge - but his first case back on the force proves to be a difficult one as he attempts to tie a serial killer with police corruption.
A sniper kills a judge, and both Major Crimes and the FBI try to get to an eyewitness who can identify the shooter before the shooter can kill him. Meanwhile, Sharon takes steps to protect Rusty from his father.
A pregnant wife is found stabbed to death in a pool, and her harried director husband's lack of grief concerns the squad.
Marissa and Sarah are hired to find a missing person and end up at a weekend retreat that may or may not be a front for a dangerous fringe religion.
As Marissa and Sarah are hired to find a missing gun for a cop, they try to prove his innocence when he is arrested for murder.
Sarah asks Marissa to investigate the death of a resident at a seniors' apartment.
The group tries to track down and arrest a deranged man posing as a taxi driver in Boston. The man beheads his victims and leaves their bodies in very public areas.
The BAU searches for a motive and an unsub when victims are found in truck stop restrooms along highways throughout the South.
Atwater goes undercover to bring down the longtime head of a criminal enterprise and becomes entangled in a situation that tests his allegiances as well as his conscience.
Upton and Burgess find themselves in a difficult situation when Intelligence tracks a cache of cop killer machine guns to a local gun show in Wisconsin.
Using information from Cruz, Intelligence chases down the robbery crew that's been using the lockbox key. Voight is under pressure to bring the crew to justice without tarnishing the reputation of a murdered firefighter.
Samaritan demonstrates its true power by taking control of New York for 48 hours and erasing crime from the city in an attempt to lure The Machine out of hiding.
Samaritan launches a cyber-attack on the stock exchange, leaving the team with no choice but to embark on a possible suicide mission in a desperate attempt to stop a global economic catastrophe.
Former international CIA operative Wesley Cole returns home and becomes Murtaugh's partner on the force; Avery continues his campaign for city council.
Murtaugh and Cole try to find their stride as they work to solve the murder of a finance executive; Cole navigates his role with his ex, Natalie, and his daughter, Maya; Avery grapples with the outcome of his campaign for city council.
Cole and Murtaugh try to balance their family lives with their efforts to bust a gang running a lottery scam.
Cole and Murtaugh look back on past mistakes as Leo Getz returns as the attorney on their latest case.
Murtaugh and Cole investigate after a robbery of a truck filled with fine art. Cole deals with lingering feelings for Natalie after a development in her life. Meanwhile, Riana blackmails Murtaugh into letting her go to a concert after she catches him in a lie he told Trish.