| Jack Scalia | ... | Wick Hayes | |
| R. Lee Ermey | ... | Capt. Phillips | |
| Ray Wise | ... | Robbins | |
| Deborah Adair | ... | Lt. Nina Crowley | |
| John Toles-Bey | ... | Joe Kane (as John Toles Bey) | |
| Ely Pouget | ... | Ana Rivera | |
| Emilio Linder | ... | Philippe | |
| Tony Isbert | ... | Fleming | |
| Álvaro Labra | ... | Carlo | |
| Luis Lorenzo | ... | Francisco | |
| Frank Braña | ... | Muller | |
| Pocholo Martínez-Bordiú | ... | Sven (as J. Martinez Bordiu) | |
| Edmund Purdom | ... | CEO Steensland | |
| Garrick Hagon | ... | Barton (as Garick Hagon) | |
| James Aubrey | ... | Contek 1 | |
| Derrick Vopelka | ... | Contek 2 | |
| Jed Downey | ... | Man on Tapes | |
| rest of cast listed alphabetically: | |||
| Salvador Sáinz | ... | Sailor OTAN (uncredited) | |
Directed by | |||
| Juan Piquer Simón | (as J.P. Simon) | ||
Writing credits | ||
| Juan Piquer Simón | (story) (as J.P. Simon) and | |
| Mark Klein | (story) | |
| David Coleman | (screenplay) | |
Produced by | |||
| Francesca DeLaurentiis | .... | producer (as Francesca De Laurentiis) | |
| José Antonio Escrivá | .... | producer (as Jose Escriva) | |
| Juan Piquer Simón | .... | producer (as J.P. Simon) | |
Original Music by | |||
| Joel Goldsmith | |||
Cinematography by | |||
| Juan Mariné | |||
Film Editing by | |||
| Isaac Sehayek | |||
| Christopher Holmes | (uncredited) | ||
Production Design by | |||
| Gonzalo Gonzalo | |||
Makeup Department | |||
| Colin Arthur | .... | special makeup effects | |
| Helen Lennox | .... | makeup artist | |
| Victoria Lenox | .... | assistant makeup artist (as Victoria Lennox) | |
Production Management | |||
| Mario Pedraza | .... | production manager | |
| Manuel Sánchez | .... | production manager: second unit | |
Second Unit Director or Assistant Director | |||
| José María Ochoa | .... | first assistant director (as Jose Maria Ochoa) | |
Art Department | |||
| Pablo Alonso | .... | painter | |
| Luis de Feo | .... | painter | |
| Francisco Molina | .... | carpenter | |
| José Molina | .... | carpenter | |
| Luis Moreno | .... | carpenter | |
| Francisco Prósper | .... | model maker (as Francisco Prosper) | |
| Emilio Ruiz del Río | .... | model maker (as Emilio Ruiz) | |
| Salvador Sáinz | .... | property master | |
Sound Department | |||
| Javier Baringo | .... | boom operator | |
| Tina Canny | .... | sound recordist | |
| Gene Corso | .... | supervising sound editor | |
| Sabrina Ann Corso | .... | adr editor | |
| David Cunningham | .... | sound re-recording mixer | |
| Patrick Cyccone Jr. | .... | sound re-recording mixer | |
| Kurt Nicholas Forshager | .... | foley editor (as Kurt N. Forshager) | |
| Tommy Goodwin | .... | adr mixer | |
| Tommy Goodwin | .... | foley mixer | |
| Kini Kay | .... | sound designer | |
| Kini Kay | .... | sound effects editor | |
| Kini Kay | .... | supervising sound editor | |
| Diane Livingston | .... | assistant sound effects editor | |
| Laura Macias | .... | foley artist | |
| Lorane Mitchell | .... | sound effects editor | |
| Frank A. Montaño | .... | sound re-recording mixer (as Frank A. Montano Jr.) | |
| Tony Pascuzzo | .... | sound recordist | |
| Paige Pollack | .... | foley artist | |
| Dean St. John | .... | adr recordist | |
| Dean St. John | .... | foley recordist | |
| Jim Willis | .... | sound engineer | |
| Stephen Lloyd Wood | .... | assistant sound editor | |
| Asher Yates | .... | sound editor | |
Special Effects by | |||
| Colin Arthur | .... | creatures | |
| Marco Besas | .... | special effects | |
| Basilio Cortijo | .... | special effects | |
| Carlo De Marchis | .... | special technical effects | |
| Sergio Hernandez | .... | special effects | |
| Carlos Rojo | .... | special effects | |
Stunts | |||
| Juan Maján | .... | stunt coordinator (as Juan Majan) | |
Camera and Electrical Department | |||
| Carlos Bustamante | .... | video engineer | |
| Juan Cobo | .... | focus puller | |
| Vicente Cobo | .... | crane operator | |
| José Luis Fernández | .... | grip | |
| Javier Lopez | .... | grip | |
| Felipe López | .... | still photographer (as Felipe Lopez) | |
| Laureano López | .... | gaffer (as Laureano Lopez) | |
| Laureano López | .... | key grip (as Laureano Lopez) | |
| Julio Madurga | .... | camera operator | |
| Manuel Rojas | .... | camera operator: second unit | |
| Anselmo Villalba | .... | grip | |
Casting Department | |||
| Craig Campobasso | .... | casting: USA | |
| Jeremy Conway | .... | casting: UK | |
| Dennis Vaugn | .... | casting: Spain | |
Costume and Wardrobe Department | |||
| María Eugenia Escrivá | .... | wardrobe designer: Spain (as Maria Escriva) | |
| Sigrid Insull | .... | wardrobe designer: USA | |
| Carmen Sigmariaga | .... | seamstress | |
Editorial Department | |||
| Nuria Galán | .... | assistant editor (as Nuria Galvan) | |
| Antonio Gimeno | .... | first assistant editor | |
| Magdalena Paradell | .... | assistant editor (as Magda Paradell) | |
Music Department | |||
| Sherry Whitfield | .... | music editor | |
Other crew | |||
| Antonio Arias | .... | underwater equipment | |
| María Bardem | .... | continuity supervisor (as Maria Bardem) | |
| Christian Cid | .... | production assistant | |
| Dale De La Torre | .... | legal services (as Dale R. De La Torre) | |
| Carlo De Marchis | .... | submarine designer | |
| Tirso Díaz | .... | production assistant (as Tirso Diaz) | |
| Monica Escudero | .... | assistant to producers | |
| Larry Ann Evans | .... | dialogue coach | |
| Luis Fernandez | .... | accountant | |
| Eduardo Macho | .... | financial supervisor | |
| Benjamin Martin | .... | production assistant | |
| Miguel Olarrieta | .... | underwater equipment | |
| Pedro Angel Ruiz | .... | production assistant | |
Thanks | |||
| Christopher Holmes | .... | special thanks: editing | |
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| Full cast and crew | Company credits | External reviews |
| News articles | IMDb Action section | IMDb Spain section |
Juan Piquer Simon's "La Grieta"/"Endless Descent" is a pretty amusing piece of sci-fi/horror schlock.The film offers plenty of entertainment,if you like multiple monsters and gory death scenes.The plot is pretty silly,but the film has some tense and exciting moments.The creature effects are pretty good and occasionally quite imaginative and there is a nice amount of blood and gore.The acting is mediocre as we can expect,but it's nice to see veteran actors like Jack Scalia and R.Lee Ermey on screen.Overall,"Endless Descent" is not as good as "Pieces" or "Slugs",but it's much better than incredibly stupid "La Mansion de los Cthulhu".So if you are a fan of low-budget sci-fi/horror you can give this one a look.Recommended.My rating:5 out of 10.