Sydney Viengluang

Unit Chief Jack Garrett (Gary Sinise) and his International Response Team (IRT) travel to Thailand when three American volunteers go missing during a trek to Bangkok, and reconnect with former colleague Clara Seger (Alana De La Garza), who helps them rush to gather evidence leading to the UnSub before a storm threatens to wash it away. Joe Mantegna guest stars as David Rossi.

Team Scorpion are blackmailed into breaking into the United Nations to help with the assassination of an arms dealer, while Sylvester tries to protect Megan's wishes.