The Saturday TV schedule at the upcoming San Diego Comic-Con is all about superheroes, witches, freaks and vampires. But mostly superheroes. 

DC and Warner Bros. have cooked up a comicbook extravaganza, booking three straight hours in Hall H in order to show off the highly anticipated series "Gotham" (making its world premiere), "The Flash" and "Constantine," plus the hit returning series "Arrow."

Meanwhile, fans will say goodbye to "True Blood," while "American Horror Story" will be making its SDCC debut.

Plus, "Family Guy" meets "The Simpsons," Syfy returns to the Con, and more. 

"The Simpsons"
The animated legend is celebrating its 25th anniversary with a panel focusing on the new Treehouse of Horror, Simpsorama, and much, much more.
When: Saturday July 26, 2014 10:00am - 10:45am 
Where: Ballroom 20
Who: Creator Matt Groening, executive producer Al Jean, supervising director MikeAnderson, and director David Silverman.

"Once Upon a Time
The cast and crew will discuss the upcoming season which will include the addition of "Frozen" heroine Elsa.
When: Saturday July 26, 2014 11:00am - 11:45am 
Where: Ballroom 20
Who: Co-creators and executive producers Edward Kitsis (Lost), and Adam Horowitz (Lost) along with Lana Parrilla (24), Josh Dallas (Thor), Emilie de Ravin (Lost), Colin O'Donoghue (The Rite), and Jared Gilmore (Mad Men)
  
"Helix"
Get a sneak peek at season 2 of the Syfy series with a panel moderated by Geoff Boucher.
When: Saturday July 26, 2014 12:00pm - 1:00pm 
Where: Indigo Ballroom, Hilton San Diego Bayfront
Who: Kyra Zagorsky (Dr. Julia Walker), Mark Ghanime (Major Sergio Balleseros), Jordan Hayes (Dr. Sarah Jordan), Neil Napier (Dr. Peter Farragut), and executive producers Ronald D. Moore and Steven Maeda.

"Defiance"
Delve into details of the Syfy show's current season with a cast and crew Q&A. 
When: Saturday July 26, 2014 1:00pm - 2:00pm 
Where: Indigo Ballroom, Hilton San Diego Bayfront
Who: Grant Bowler (Nolan), Julie Benz (Amanda Rosewater), Jaime Murray (Stahma Tarr), and more to come.

"Family Guy"
Longtime Comic-Con fave returns with an exclusive sneak peek at the historic "Family Guy"/"The Simpsons" crossover episode 
When: Saturday July 26, 2014 1:00pm - 1:45pm 
Where: Ballroom 20
Who: Seth Green (Robot Chicken), Mike Henry (The Cleveland Show), and executive producers Rich Appel (The Simpsons, The Cleveland Show), Steve Callaghan (American Dad), Danny Smith, and co-executive producer Peter Shin, plus other surprise guests.

"The Blacklist"
The cast and crew talk about what fans can expect in season two, which premieres on NBC September 22.
Where: Saturday July 26, 2014 1:45pm - 2:45pm 
When: Room 6A
Who: James Spader (The Avengers: Age of Ultron, Boston Legal) and executive producers Jon Bokenkamp (The Call, Taking Lives) and John Eisendrath (Alias, Beverly Hills, 90210) 

"American Dad"
Get an exclusive look at the new season -- now on TBS -- and a fan Q&A
When: Saturday July 26, 2014 2:00pm - 2:45pm 
Where: Ballroom 20
Who: Dee Bradley Baker (Phineas and Ferb, Star Wars: The Clone Wars) and executive producers Matt Weitzman and Brian Boyle, and more.

"Grimm"
What's planned for season 4? Find out at the hit show's panel which will include a Q&A session with the cast and producers.
When: Saturday July 26, 2014 3:00pm - 3:45pm 
Where: Ballroom 20
Who: David Giuntoli, Russell Hornsby, Bitsie Tulloch, Silas Weir Mitchell, Reggie Lee, Sasha Roiz, Bree Turner, Claire Coffee, and executive producers/writers Jim Kouf, David Greenwalt, and Norberto Barba.

"Ascension"
Fans can get an exclusive look at Syfy's upcoming event series dealing with the mysteries of deep space.
When: Saturday July 26, 2014 3:15pm - 4:15pm 
Where: Room 6DE
Who: Stars Tricia Helfer (Viondra Denninger) and Brian Van Holt (Captain William Denninger) executive producer Philip Levens, and more TBA

"The Vampire Diaries"
The show's sixth SDCC appearance will bring with it a video screening and a Q&A session, and a look at The Complete Fifth Season's upcoming Blu-ray release (September 9).
When: Saturday July 26, 2014 4:00pm - 4:45pm 
Where: Ballroom 20
Who: Stars Nina Dobrev (Degrassi: The Next Generation), Paul Wesley (Roll Bounce), Ian Somerhalder (Lost), and Kat Graham (Honey 2) join executive producer/writer Julie Plec (The Originals, Kyle XY)

"True Blood"
The HBO's show's seventh and final season began on June 22, so this is the last chance for fans to celebrate the long-running series. 
When: Saturday July 26, 2014 5:00pm - 6:15pm 
Where: Ballroom 20
Who: Cast and crew TBA

"Constantine"
Comic-Con fans are sure to turn out in droves for a look at the upcoming adaptation of the Vertigo Comics legend. Attendees will see a screening of the complete pilot, followed by a Q&A. "Constantine" premiers on NBC October 24.
When: Saturday July 26, 2014 5:15pm - 6:15pm 
Where: Room 6BCF
Who: Stars Matt Ryan (Criminal Minds: Suspect Behavior), Harold Perrineau (Lost) and Charles Halford (True Detective) and executive producers Daniel Cerone (Dexter) and David S. Goyer (The Dark Knight trilogy).

"Salem"
The cast will look back at the WGN show's first season, followed by an audience Q&A.
When: Saturday July 26, 2014 5:45pm - 6:45pm 
Where: Room 6DE
Who:  Stars Shane West (Nikita), Janet Montgomery, Seth Gabel, Ashley Madekwe, Iddo Goldberg, and Elise Eberle, along with executive producers Brannon Braga (Star Trek), Adam Simon, and Josh Barry

"Person of Interest"
Believe it or not, its the CBS series' fourth year at SDCC, and loyal fans will see a special video presentation and Q&A. 
When: Saturday July 26, 2014 6:15pm - 7:00pm 
Where: Room 6BCF
Who: Executive producer Greg Plageman, more TBA

"American Horror Story: Freak Show"
The FX miniseries making its Comic-Con debut with an exclusive look back at "Coven," followed by an all-star panel and some exclusive secrets from"Freak Show."
When: Saturday July 26, 2014 7:00pm - 8:00pm 
Where: Room 6DE
Who: Stars Angela Bassett, Kathy Bates, Michael Chiklis, Sarah Paulson, Evan Peters, Emma Roberts, and executive producer Tim Minear.

Warner Bros. television and DC Entertainment: "The Flash," "Constantine," "Arrow" and "Gotham"
All four small scren DC adaptations will be in one place, despite differences in networks. The three-hour event will begin with the world premiere public screening of "Gotham," followed by a screening of the pilot episode of "The Flash." Exclusive video presentations of "Arrow" and "Constantine" will follow, but it's not clear if this content will overlap with the previously listed "Constantine" panel. Cast and producers from all four series will make special appearances on stage throughout the night, with the festivities to be hosted by "Arrow" star Stephen Amell. 
When: Saturday July 26, 2014 8:00pm - 11:00pm 
Where: Hall H
Who: Stephen Amell and, presumably, just about everyone else involved in the four shows. 

Check out Saturday's movie schedule here -- including panels for "The Hobbit," "Sin City: A Dame to Kill For" and the Marvel Cinematic Universe.