Jan. 15 (UPI) -- Universal Studios Hollywood announced Thursday that tickets are now on sale for the second annual Fan Fest Nights. Fan Fest Nights will be held April 23-25 and May 1-3, 7-9 and 14-16.

Last year's Dungeons & Dragons: Secrets of Waterdeep returns "due to popular demand" from last year. The experience welcomes attendees on a Forgotten Realms mission that includes audience participation in puzzle-solving and large Jim Jenson Creature Shop animatronic creatures.

One Piece had costumed characters last year. This year, they are putting on a Grand Pirate Show in the Waterworld stunt show arena.

Scooby-Doo Meets the Universal Monsters is a new immersive walk-through this year. The Studio Tour tram drops guests off on the backlot to solve a mystery with Scooby, Fred, Daphne, Velma and Shaggy.

The mystery walks through Little Europe and Court of Miracles outdoor sets for a mystery involving Frankenstein, Dracula, The Wolf Man and The Bride of Frankenstein. Those sets were featured in 1931's Frankenstein and 1941's The Wolf Man.