碟中谍小组这次的对手是一个职业杀手，他会在最后一刻随机做出决定，以确保他的行动不可预测。他们必须为各种可能的情况做好准备，以接近杀手，挫败他的计划。

Un tueur à gages est sur le point d'assassiner une personnalité dont on ignore l'identité, sur ordre du non moins mystérieux "Scorpion". L'équipe doit empêcher ce meurtre, et démasquer le commanditaire...

Hired killer Eddie Lorca does everything randomly, making him impossible to anticipate. The IMF must find out who his boss, Scorpio, is and all they know is Lorca is arriving in town for an assignment - they don't know who he's going up against. The team creates a ""blank"" hotel and Paris as a cabdriver intercepts Lorca at the airport. Paris and Willy have to stall when it takes more time to set up the hotel then it takes according to the phone book to get to ""their"" hotel. They then put the room number Lorca randomly chooses on the bugged room they have set up. They intercept Lorca's call to his contact, and Paris-as-Lorca meets her instead to find out the target. Dana then delivers the contract to Lorca using the information Paris obtained. The target is a black union leader, and Barney must take the man's place. Lorca eludes surveillance and almost kills Barney with a planted explosive, but Jim figures things out just in time. The team then fake Dana's death, and she gives a dying-b