外星闖入者哈里·范德斯佩格爾和麥卡利斯特將軍擱置分歧，共同面對更大的生存威脅——即將到來的灰人入侵。 Extraterrestrial interloper Harry Vanderspeigle and General McCallister put aside their differences and work together in the face of a much greater existential threat - the impending invasion of the Greys.