When an ex-FBI agent suddenly resurfaces in a brutal Tripoli prison, Forrester and Powell risk everything to go under cover as prisoners to break him out; the fly team adjusts to their new and improved HQ.

When an American family's lavish sweet sixteen celebration is cut short after the mother of the birthday girl is found dead near their European estate, the Fly Team heads to Monaco to find the woman's murderer. Vo begins seeing Raines in a new light.

The Fly Team heads to Bulgaria in search of a wanted criminal who is exploiting underage American girls. Meanwhile, Raines becomes curious when Forrester asks him to keep an eye on Powell.

When a disgraced former U.S. cabinet member is arrested in Vienna, the Fly Team is sent to investigate whether he and his assistant were peddling classified government documents. Powell struggles as he is forced to stay behind on desk duty.

The Fly Team is called in to investigate when an American college student is arrested at a hostel in Prague for showing aggression toward local police who were dismissive of her sexual abuse claims. Also, Vo makes use of her sexual assault advocacy experience from her army days as they work to ensure the victim gets justice.

The Fly Team heads to the Tuscan countryside after an American couple's son is kidnapped right outside their new home. Concerns are heightened as fingers begin to point to the mafia.

Assistant Special Agent in Charge Jubal Valentine heads to Budapest to personally help the Fly Team and the CIA take down the cartel that murdered his former girlfriend and colleague. As part of the mission, Forrester poses as an undercover arms expert.

When a U.S. mercenary claiming to fight child trafficking abroad is apprehended at a remote Romanian border police outpost after the U.S. DOJ suspects his crew of embezzlement, Tate and Raines attempt to get him to flip on the leader of the group. The mission takes a turn when the outpost is attacked as they work to secure evidence.

When a wild night in Amsterdam for three ex-Navy men ends with one found dead in his hotel room, the Fly Team must dive into the red-light district to hunt down his killer. Meanwhile, Tate finds herself in a bind with her ex over custody of their daughter.

When a former member of the Irish Republican Army turned U.S. citizen is shot while in London with his son touring youth football academies, Smitty and the Fly Team work to hunt down the people responsible as the group becomes increasingly violent. While in London, Smitty pays a visit to her mother who she believes can help the team locate an old family friend who may have a connection to the case.

When the owner of a prominent cyber security company is murdered in Copenhagen, mass amounts of data are leaked, sending the NSA to the Fly Team for assistance, including the Bureau's liaison to the NSA.

The Fly Team heads to Oslo when they are tipped off that two Norwegian prisoners are being held in Russia.

The Fly Team meets Supervisory Special Agent Wesley "Wes" Mitchell when his partner is shot in LA and the suspects flee to Budapest, sending Mitchell overseas.

When a U.S. ambassador is taken hostage at a TV station in the Netherlands alongside 70 civilians, the Fly Team is forced to work quickly to find out who they're up against. Meanwhile, Wes works to earn the respect of his new team.

When an American teenager disappears from a beach party during her senior year trip to Portugal, the Fly Team heads up the search, which is further complicated by the missing teen's parents' differing opinions.

The deputy inspector general calls on Tate, who is fluent in Spanish, to take on her first undercover field mission, joining Wes and the team in Spain as they investigate a seemingly dirty U.S. Drug Enforcement Administration special agent working out of Madrid.

When an American man is kidnapped in Warsaw alongside a Ukrainian woman he met on a dating site, the Fly Team heads to Poland to track down the mastermind behind the site.

When a bus full of American volunteers is hijacked in a dangerous section of Morocco, the Fly Team works to locate the missing aid workers and the people who kidnapped them.

Wes' former colleague, U.S.-based agent Tyler Booth, enlists the Fly Team's assistance in helping him capture an American on the FBI's "Most Wanted" list by luring him out of Russia with the help of the perp's conflicted ex-wife.

When the star witness in the case against Greg Csonka, the man responsible for the death of Wes' former partner, is beaten to death in a Budapest prison before he can testify, the Fly Team attempts to salvage the case to secure Csonka's conviction.

A member of the Fly Team goes missing as the hunt for Greg Csonka continues in Paris. Meanwhile, Vo’s life hangs in the balance after being shot.

When a Russian biochemist is assassinated for trying to defect with his highly sensitive biotoxins research, the Fly Team springs into action to protect his daughter, whose father’s last wish was that she get his research to a trusted American microbiologist. Meanwhile, Mitchell stays behind to help Vo during her recovery, and Booth clashes with Smitty when he finds out she could jeopardize his promotion.

When an American student is found dead at a prestigious UK university, the Fly Team investigates an infamous secret society. Smitty’s personal history with the school comes to a head when she’s confronted with the same old-world elitism.

The Fly Team leads an international manhunt when an American woman and her new husband flee from Baltimore to Istanbul with her young son after a heinous murder. Also, Vo partners up with Special Agent Riley Quinn, who was not only sent to Budapest to work her first big case alongside The Fly Team but to also clandestinely investigate a member of the team.

When an American businessman is gunned down in Bratislava, the Fly Team must work with an unscrupulous local detective while safeguarding the sole witness, a fearful tourist from Wisconsin being held by police. Meanwhile, Quinn begins to feel pressure from her brother to deliver information on Mitchell.

After a young American woman is brutally murdered in Venice, the Fly Team is met with hostility when they discover that their person of interest has ties to a well-connected Italian family. Soon, the case gets even more complicated when the CIA Station Chief shows up with an agenda of his own. Meanwhile, pressure mounts on Quinn to deliver intel on Mitchell.

When a televangelist on the FBI’s most wanted list surfaces in Gibraltar to seek asylum, the Fly Team’s attempts to take him down hit a roadblock as they face political stonewalling upon arrival to the region. When the predatory preacher goes after the daughter of a disciple as his next target, the team must abandon protocol to intervene.

After an American CEO living in Prague is extorted for millions in cryptocurrency and his family is kidnapped, Mitchell receives a surprise visit from his ex-girlfriend, FBI Special Agent Ella Driscoll, who wants the Fly Team’s help on the case.

When a psychologist with national security intel goes missing on a hike in the Swiss Alps, the Fly Team works alongside a friendly face, Agent Tyler Booth, to find him. Meanwhile, Mitchell receives unnerving news regarding his biological father.

The Fly Team heads to the country of Georgia to determine the motive behind an attack that targeted two American soldiers at a NATO-Georgia joint training center before it turns into an international incident. Meanwhile, a supervisory position opens in another FBI division in Europe, and Mitchell encourages both Vo and Raines to apply.

When a suspected American arms dealer with a lengthy rap sheet pops up in Vienna with stolen weapons, the Fly Team sends Mitchell and Smitty undercover to try to infiltrate his operation. During the mission, Smitty enters muddy waters while working with the suspect’s wife. Meanwhile, Mitchell’s biological father shows up in Budapest after being released from prison to seek him out despite Mitchell’s disinterest.

When an American official in charge of a high-profile three-way prisoner swap in Belgrade is detained in Romania, he requests the Fly Team step in and carry out the exchange. When their convoy is attacked and one of the prisoners escapes, the team must do everything in their power to find the missing prisoner before the highly sensitive mission is compromised.

When an American student and sex worker is murdered in Budapest, similarities to a recent case in Japan lead the Fly Team to partner with detectives from Tokyo.