The 'Harry Potter' star joins the CW superhero drama in season three as a Central City Police Department crime scene investigator.
'You never know when those worlds may intersect,' executive producer Manny Coto said.
Plus, Rick Springfield will be playing Lucifer in The CW drama's 12th season.
Hall H broke out in an impromptu rendition of 'Happy Birthday' to the British star, who turned 40 on July 19.
The cast also teases a seedy new nightclub for Gotham's criminal underworld.
Find out what's happening in season five of the CW superhero drama.
'Everything is different.'
'I just don't want to mess anything up,' new addition Nick Zano said Saturday.
Plus, scoop on who new series regular Chris Wood may be playing on the CW drama.
The sci-fi icon talked 'Star Trek: Discovery' at this year's Comic-Con.
The 'Arrow' star admits that his handle on the Russian language wasn't always up to par.
The TV couple is walking down the aisle IRL!
Executive producer Julie Plec made the emotional announcement at the show's final Comic-Con panel.
Oded Fehr is playing the Disney villain, Jafar, in the sixth season.
