Human-alien encounters 6 Government investigators 5 Informers 5 Families 3 Parapsychology 3 Simpson, Homer (Fictitious character) 3 Simpsons (Fictitious characters) 3 more ... Springfield (Imaginary place) 3 Commando troops 1 Dysfunctional families 1 Military spouses 1 Monsters 1 Sightings and encounters 1 Simpson, Bart (Personaje literario) 1 Special operations (Military science) 1 Undercover operations 1 Unidentified flying objects 1 Video recordings for the hearing impaired 1 less ...