The Lionhearts The Lionhearts is an animated series from MGM that aired on Saturday and Sunday mornings in syndication from 1998 to 2000. Details Casts Posters Season Lists Title The Lionhearts Genres Animation Family Comedy First Air Date 1998-09-19 Last Air Date 1998-12-05 Episode Runtime 00 Hours 00 Minutes Total Season(s) 1 Total Episode(s) on All Seasons 13 Runtime Production Companies Metro-Goldwyn-Mayer Animation William H. Macy... Leo (voice)... Peri Gilpin... Lana (voice)... Natasha Slayton... Kate (voice)... Cameron Finley... Spencer (voice)... Nicolette Little... Judy (voice)... Original Size (1000x1493) Season 1 13 Episode(s) 1998-09-19