高中生瑞科（卡斯帕•凡•迪恩 Casper Van Dien 饰）毕业后，在女友卡门（丹妮丝•理查兹 Denise Richards 饰）的鼓动下，违背了父亲的意志，加入了机械化步兵学院，卡门亦加入了海军学院。在他们参加训练不久后，地球遭到了来自外星球的昆虫袭击。瑞科的亲人均惨遭杀害，卡门将拍摄到的影像传送给了瑞科。悲愤交加的瑞科率领部下投入到了对抗外星昆虫的战斗中。然而，军队低估了这些昆虫的实力。在一次遭遇战中，10万军队惨遭杀戮，只剩瑞科、卡门等几人侥幸逃生。瑞科亲眼目睹了恐怖的杀戮场面，意外获知了这些昆虫变得如此聪明、强大的秘密。瑞科意识到必须制造更先进的武器才能对付这些昆虫，人类的反击开始了！

Based on a 1924 mystery novel by Agatha Christie, The Man in the Brown Suit was the eighth of Warner Bros. Television's Christie-inspired TV movies. Stephanie Zimbalist stars as an American tourist in Cairo (with Spain standing in for Egypt). She runs across a mysterious murder, and an odd encounter with a stranger; all this occurs even before she sets foot on a luxury liner with an all-suspect passenger manifest. It is established that the murderer, who is after a cache of valuable diamonds, is an internationally notorious criminal--but which one of the passengers is he (or she) Maybe the villain romantic lead Simon Dutton, the man in the brown suit of the title...but don't discount such special guest suspects as Rue McClanahan and Tony Randall.