The 31st Saturn Awards, honoring the best in science fiction, fantasy and horror film and television in 2004, were held on May 3, 2005, at the Universal City Hilton Hotel in Los Angeles, California, United States.

Below is a complete list of nominees and winners. Winners are highlighted in bold.

Winners and nominees Film Best Sci-Fi Film Best Fantasy FilmEternal Sunshine of the Spotless Mind The Butterfly Effect The Day After Tomorrow The Forgotten I, Robot Sky Captain and the World of TomorrowSpider-Man 2 Birth Harry Potter and the Prisoner of Azkaban Hellboy Lemony Snicket's A Series of Unfortunate Events House of Flying Daggers Best Horror Film Best Action/Adventure/Thriller FilmShaun of the Dead Blade: Trinity Dawn of the Dead The Grudge Open Water Saw Van HelsingKill Bill: Volume 2 The Aviator The Bourne Supremacy Collateral The Manchurian Candidate National Treasure The Phantom of the Opera Best Animated Film Best ActorThe Incredibles The Polar Express Shark Tale Shrek 2Tobey Maguire – Spider-Man 2 as Peter Parker/Spider-Man Christian Bale – The Machinist as Trevor Reznik Jim Carrey – Eternal Sunshine of the Spotless Mind as Joel Barish Tom Cruise – Collateral as Vincent Matt Damon – The Bourne Supremacy as Jason Bourne Johnny Depp – Finding Neverland as J.M. Barrie Best Actress Best Supporting ActorBlanchard Ryan – Open Water as Susan Watkins Nicole Kidman – Birth as Anna Julianne Moore – The Forgotten as Telly Paretta Uma Thurman – Kill Bill: Volume 2 as The Bride/Beatrix Kiddo Kate Winslet – Eternal Sunshine of the Spotless Mind as Clementine Kruczinsky Zhang Ziyi – House of Flying Daggers as MeiDavid Carradine – Kill Bill: Volume 2 as Bill Alfred Molina – Spider-Man 2 as Otto Octavius/Doctor Octopus Gary Oldman – Harry Potter and the Prisoner of Azkaban as Sirius Black Giovanni Ribisi – Sky Captain and the World of Tomorrow as Dex Liev Schreiber – The Manchurian Candidate as Congressman Raymond Prentiss Shaw John Turturro – Secret Window as John Shooter Best Supporting Actress Best Young Actor/ActressDaryl Hannah – Kill Bill: Volume 2 as Elle Driver Kim Basinger – Cellular as Jessica Martin Irma P. Hall – The Ladykillers as Marva Munson Angelina Jolie – Sky Captain and the World of Tomorrow as Commander Fransesca "Franky" Cook Diane Kruger – National Treasure as Abigail Chase Meryl Streep – The Manchurian Candidate as Senator Eleanor Prentiss ShawEmmy Rossum – The Phantom of the Opera as Christine Daaé Cameron Bright – Birth as Sean Perla Haney-Jardine – Kill Bill: Volume 2 as B.B. Freddie Highmore – Finding Neverland as Peter Llewelyn Davies Jonathan Jackson – Riding the Bullet as Alan Parker Daniel Radcliffe – Harry Potter and the Prisoner of Azkaban as Harry Potter Best Director Best ScreenplaySam Raimi – Spider-Man 2 Alfonso Cuarón – Harry Potter and the Prisoner of Azkaban Michel Gondry – Eternal Sunshine of the Spotless Mind Michael Mann – Collateral Quentin Tarantino – Kill Bill: Volume 2 Zhang Yimou – House of Flying DaggersAlvin Sargent – Spider-Man 2 Stuart Beattie – Collateral Brad Bird – The Incredibles Charlie Kaufman – Eternal Sunshine of the Spotless Mind Steve Kloves – Harry Potter and the Prisoner of Azkaban Quentin Tarantino – Kill Bill: Volume 2 Best Score Best Costume DesignAlan Silvestri Van Helsing The Polar Express Danny Elfman – Spider-Man 2 Michael Giacchino – The Incredibles Edward Shearmur – Sky Captain and the World of Tomorrow John Williams – Harry Potter and the Prisoner of AzkabanKevin Conran – Sky Captain and the World of Tomorrow Alexandra Byrne – The Phantom of the Opera Wendy Partridge – Hellboy Gabriella Pescucci, Carlo Poggioli – Van Helsing Jany Temime – Harry Potter and the Prisoner of Azkaban Emi Wada – House of Flying Daggers Best Make-Up Best Visual EffectsJake Garber, Matt Rose, Mike Elizalde – Hellboy David LeRoy Anderson, Mario Cacioppo – Dawn of the Dead Greg Cannom, Steve LaPorte – Van Helsing Nick Dudman, Amanda Knight – Harry Potter and the Prisoner of Azkaban Paul Jones – Resident Evil: Apocalypse Valli O'Reilly, Bill Corso – Lemony Snicket's A Series of Unfortunate EventsJohn Dykstra, Scott Stokdyk, Anthony LaMolinara, John Frazier – Spider-Man 2 Peter Chiang, Pablo Helman, Thomas J. Smith – The Chronicles of Riddick Karen E. Goulekas, Neil Corbould, Greg Strause, Remo Balcells – The Day After Tomorrow Roger Guyett, Tim Burke, Bill George, John Richardson – Harry Potter and the Prisoner of Azkaban John Nelson, Andrew R. Jones, Erik Nash, Joe Letteri – I, Robot Scott Squires, Ben Snow, Daniel Jeannette, Syd Dutton – Van Helsing

Television Programs Best Network TV Series Best Syndicated/Cable Television SeriesLost (ABC) Alias (ABC) Angel (The WB) CSI: Crime Scene Investigation (CBS) Smallville (The WB) Star Trek: Enterprise (UPN)Stargate SG-1 (Sci-Fi) Dead Like Me (Showtime) The Dead Zone (USA Network) The 4400 (USA Network) Nip/Tuck (FX) Stargate Atlantis (Sci-Fi) Best Television PresentationFarscape: The Peacekeeper Wars (Sci-Fi) The Dead Will Tell (CBS) 5ive Days to Midnight (Sci-Fi) Legend of Earthsea (Sci-Fi) The Librarian: Quest for the Spear (TNT) Salem's Lot (TNT)

Acting Best Television Actor Best Television ActressBen Browder – Farscape: The Peacekeeper Wars (Sci-Fi) as John Crichton Richard Dean Anderson – Stargate SG-1 (Sci-Fi) as Jack O'Neill Matthew Fox – Lost (ABC) as Jack Shephard Julian McMahon – Nip/Tuck (FX) as Christian Troy Tom Welling – Smallville (The WB) Noah Wyle – The Librarian: Quest for the Spear (TNT) as Flynn CarsenClaudia Black – Farscape: The Peacekeeper Wars (Sci-Fi) as Aeryn Sun Kristen Bell – Veronica Mars (UPN) as Veronica Mars Jennifer Garner – Alias (ABC) as Sydney Bristow Anne Heche – The Dead Will Tell (CBS) as Emily Parker Evangeline Lilly – Lost (ABC) as Kate Austen Amber Tamblyn – Joan of Arcadia (CBS) as Joan Girardi Best Supporting Television Actor Best Supporting Television ActressTerry O'Quinn – Lost (ABC) Kyle MacLachlan – The Librarian: Quest for the Spear (TNT) as Edward Wilde James Marsters – Angel (The WB) as Spike Dominic Monaghan – Lost (ABC) as Charlie Pace Michael Rosenbaum – Smallville (The WB) as Lex Luthor Michael Shanks – Stargate SG-1 (Sci-Fi) as Daniel JacksonAmanda Tapping – Stargate SG-1 (Sci-Fi) as Samantha Carter Amy Acker – Angel (The WB) as Winifred Burkle and Illyria Erica Durance – Smallville (The WB) as Lois Lane Torri Higginson – Stargate Atlantis (Sci-Fi) Samantha Mathis – Salem's Lot (TNT) Sonya Walger –The Librarian: Quest for the Spear (TNT) as Nicole Noone

DVD Best DVD Release Best DVD Special Edition ReleaseStarship Troopers 2: Hero of the Federation Bionicle 2: Legends of Metru-Nui Ju-on: The Grudge The Lion King 1½ The Lost Skeleton of Cadavra Ripley's GameThe Lord of the Rings: The Return of the King – The Extended EditionThe Chronicles of Riddick – The Unrated Director's Cut Hellboy – The Director's Cut King Arthur – The Extended Unrated Edition Shrek 2 - Special Edition Spider-Man 2 – Special Edition |- ! style="background:#EEDD82; width:50%" | Best Classic Film DVD Release ! style="background:#EEDD82; width:50%" | Best DVD Movie Collection |- | valign="top" |Dawn of the Dead Aladdin Dance of the Vampires Duel Freaks THX 1138The Star Wars Trilogy The Best of Abbott and Costello vol. 1 – 3 The Marx Brothers Silver Collection The Monster Legacy Collections The Tarzan Collection The Ultimate Matrix Collection Best DVD Television Release Best Retro Television Series on DVDSmallville – Seasons 2 & 3 Buffy the Vampire Slayer – Seasons 2 & 3 Farscape – Season 4 The Simpsons – Seasons 4 & 5 Star Trek: Voyager – Seasons 1–7 A Wrinkle in TimeStar Trek: The Original Series – The Complete Series Jonny Quest – The Complete Series Land of the Lost – Seasons 1 & 2 Lost in Space – Seasons 1 & 2 My Favorite Martian – Season 1 Night Gallery – Season 1

Special awards Special Recognition Award The Star Trek franchise from 1987 to 2005 (Star Trek: The Next Generation, Star Trek: Deep Space Nine, Star Trek: Voyager and Star Trek: Enterprise)

Filmmaker's Showcase Award Kerry Conran

Life Career Award Stephen J. Cannell Tom Rothman

Service Award Bill Liebowitz (Posthumously)

External links The Official Saturn Awards Site The Official Saturn Awards Site Archive of Nominations and Winners for 2004