‘FBI: International’ Series Finale: Mitchell Chases Serial Killer to Japan in Promo (VIDEO)

The Fly Team has quite the case on its hands to close out FBI: International as they hunt a prolific serial killer.

The CBS drama is ending after four seasons with a two-parter, with the conclusion airing with “Gaijin” on Tuesday, May 20. The serial killer brought Reiko Isokawa (Yoriko Haraguchi) and Superintendent Kosuke Kubo (Shintaro Kanaoya) from Japan to Budapest, and while they thought they’d gotten their guy (he died by suicide in their custody), it turned out he wasn’t working alone. The Japanese victims who survived were expertly drugged, while the latest victim, which brought the Fly Team onto the case, had been given a sloppy injection. Furthermore, a few Japanese women identified their attacker as being older. The younger one they’d arrested was guided online by someone else until that communication ended a year prior.

Mitchell (Jesse Lee Soffer) realized it was a dyad, the younger the beta and the other one the alpha, who pulled the strings. They worked together in Tokyo, but Raines (Carter Redwood) noted, in Budapest, the beta was working solo and went off script, trying to impress the alpha. The mastermind’s identity was still unknown, but they knew he was in Tokyo. Isokawa made her case to Superintendent Kubo, who agreed to let one of the Fly Team join them in Tokyo but warned the rules were different there. “Japan will have all final decisions,” he told Mitchell. He also left Isokawa to give him a rundown of their protocols.

Now, the promo for “Gaijin” shows Mitchell in Japan, where he discovers that there are “way more” than 13 victims. Can the Fly Team put an end to the international killing spree? Watch the promo above, then scroll down to see the photos.

FBI: International, Series Finale, Tuesday, May 20, 9/8c, CBS