ANDY TAYLOR The doomed sheriff of Home, Pa., a town Scully likens to Mayberry (Episode 75).

APOLOGY IS POLICY The alternate tag line that replaces ''The Truth Is Out There'' in ''731'' (58). A Scully theory, referring to the government's policy of apologizing for shameful deeds that can't be covered up.

BIG BLUE The supposed prehistoric lake-dwelling monster of ''Quagmire'' (71).

CHACO CHICKEN Where you'll find poultry and much, much more in ''Our Town'' (47).

CREUTZFELDT-JAKOB Name of the disease suffered by a murdered man, then cannibalistically spread among the population of Dudley, Ark., in ''Our Town'' (47).

DECEIVE, INVEIGLE, OBFUSCATE Scully's mantralike description of governmental response to allegations of paranormal phenomena in ''Teliko'' (76).

E.B.E. Extraterrestrial Biological Entity -- a synonym for ''alien,'' used in the episode of the same name (16).

EI 'AANIIGOO 'AHOOT'E The show's opener tag line (''The Truth Is Out There'') was translated into Navajo for the New Mexico-based ''Anasazi'' (48).

FALLEN ANGEL Military term for a UFO crash in episode of the same title (9).

GEORGE HALE An alias Mulder uses in ''Sleepless'' (27).

''HE/SHE IS ONE'' Scrawled on the backs of kidnapped teenagers in ''Red Museum'' (33).

ISKENDARIAN CONSTRUCTION Employer of a renovator of minds as well as rooms in ''Unruhe'' (77).

JOURNEY TO THE CENTER OF THE EARTH The movie on Mulder's TV at the start of ''The Erlenmeyer Flask'' (23).

''KISS/KILL'' The words written on serial killer Luther Lee Boggs' knuckles in ''Beyond the Sea'' (12).

LITCHFIELD PROJECT A government eugenics experiment (based on a Russian model), allegedly connected to the creation of psychopathic clones in ''Eve'' (10).

THE MAGICIAN Mulder's favorite TV series as a child -- and the show he's planning to watch when his sister is abducted in ''Little Green Men'' (24).

MERCHANDISE The cryptic reference to alien-human hybrids in the Department of Defense's top secret UFO files in ''Anasazi'' (48).

MORLEYS The brand of cigarettes Cancer Man chain-smokes.

MUFON Mutual UFO Network -- the clique of abduction survivors who ''recognize'' fellow abductee Scully in ''Nisei'' (57).

NICAP National Investigative Committee of Aerial Phenomena, conspiracy hobbyists, primarily obsessed with UFO cover-ups. Max Fenig is wearing a NICAP baseball hat in ''Fallen Angel'' (9); three episodes later it turns up on Mulder's office hat stand.

''ONE TO-DAY IS WORTH TWO TO-MORROWS'' The Benjamin Franklin quote on the desk of the dead boss in ''Shadows'' (5).

OPERATION FALCON The secret military cleanup of crashed UFOs in ''Fallen Angel'' (9).

PLANET OF THE APES Referred to twice in ''War of the Coprophages'' (61), initially after Scully says, ''Don't look too hard. You might not like what you find.'' To which Mulder replies, ''Isn't that what Dr. Zaius said to Charlton Heston [in] Planet of the Apes?''