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. As they dive back into the investigation, Mitchell is forced to confront the pain of losing his partner. Meanwhile, Wes assists Booth with preparing for his promotion interviews.

Wes’ former colleague, U.S.-based agent Tyler Booth (guest star Jay Hayden), 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 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.

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.

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 Deal

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.

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.

The Fly Team meets Supervisory Special Agent Wesley "Wes" Mitchell when his partner is shot in LA.