Claudus, voiced by the original Lion-O himself Larry Kenney, tells Lion-O to let him show off what the Sword of Omens can do "in the proper hands." Jaga mentions that Claudus was much like Lion-O himself in his youth and Claudus gets to do the rallying cry one last time.
Viragor is a monstrous bird who's violently over-protective of his home. This may seem familiar to Avatar: The Last Airbender fans.
Channel Hop: Well, more like Production Company Hop: This series is produced by Warner Bros. as they had acquired the post-1974 note all material before that was first acquired by Lorne Michaels through his company, Broadway Video (he had bought it from GE, who had owned R-B for a period in the mid-70s); in the mid 90s, he sold that off to Golden Books, and the library became part of Golden Books Family Entertainment; in 2002 that was spun off as Classic Media, and in 2012, DreamWorks Animation acquired Classic MediaRankin/Bass library when they acquired Lorimar-Telepictures in 1989 (Telepictures had bought R-B in 1978, then merged with Lorimar in 1986).
The death of Lion-O's mother in childbirth was one of the major fan theories from the very beginning.
Several fans settled on the name "Leona" for the Queen of Thundera before Dan Norton confirmed they crew called her that too.
Almost immediately after Panthro lost his arms fans not only theorized that he would get new cybernetic ones, but it's the Berbils that hook him up with them. Guess what happened in the very next episode.
A few fans actually did guess that Pumyra would betray the Cats a week before it happened.
Mean Character, Nice Actor: Matthew Mercer, voice of Tygra and all around awesome guy, admits that after reading scripts and doing recordings, he sometimes wants to just step back and yell "He's (Tygra) such a dick!"
Network to the Rescue: The show's ratings were okay, but the toys didn't sell as well as hoped so Warner Bros. talked Cartoon Network into moving the show from Friday nights to Saturday mornings as a lead-in to the popular DC Nation programing block. The show's ratings doubled overnight. Unfortunately...
Screwed by the Network: The first sign of trouble was Bandai discontinuing the toyline. The next was when CN decided to end the show at episode 26 shortly before the toyline was announced to be dead.
New info from an inside source indicates that the toy line isn't dead, and was a mistake made by Amazon.com which has been corrected. Bandai still seems to be supportive of the line. The rest concerning Cartoon Network is true though. It should be noted that Cartoon Network never aired any promotion of the new time, either on-air advertising or in their online media, so viewers who missed or had no access to the WB press releases had no idea where the show went.
Toonami has decided to pick up the series as part of it's new expanded block, alongside fellow CN favorite Sym-Bionic Titan, giving them the support and reruns they needed which Cartoon Network itself never provided, though now at a very late time slot. Time will tell if this is enough to get both shows another season.
Unfortunately, both shows have been taken off in favor of Sword Art Online and Season 2 of The Big O. Though Sym-Bionic Titan will return, Thunder Cats is suffering the worst of it, as Toonami is losing the rights to the show and won't be able to air it again. We can now only hope if its reruns on Toonami have been successful in garnering a second season.
Though the uncertainty of the show's future could simply be chalked up to the trolling creators, who've been yanking audiences chains from day one, Panthro is dead!
Leo is voiced by Will Friedle in his first appearance because of Lion-O reliving events of the past through Leo. "Birth of the Blades" has Jason Marsden voicing him, and this is likely what Leo's actual voice sounds like. This is something of a Casting Gag, since Will and Jason are good friends.
The Ancient Spirits of Evil are voiced by Jim Cummings when they debut in "Native Son", but their appearance in "Birth of the Blades" has them voiced by Kevin Michael Richardson instead.
Role Reprisal: In the Brazilian Portuguese dub, Élcio Romar (the voice of Snarf in the classic series) recorded a few new loops for his character, making Snarf sound like a cross between Ollie the opossum and Togepi.
In the 2017 interview, Norton revealed that the reason why several characters were killed off in the first season and Pumyra and Tygra were planned to be killed off in the second planned season isn't because the crew hated them but because it was their intention was to present a sharp edged show where Anyone Can Die (good or bad, cute or ugly, etc.) to highlight the danger of the conflict, which explains why some fans felt that it could've been aimed at older audiences than younger audiences, given the tone.