Season 1 (Harley Quinn)

The first season of premiered on November 29, 2019, and concluded on February 21, 2020. It consists of 13 episodes.

Main Cast

 * Kaley Cuoco as Harley Quinn (Harleen Quinzel) *
 * Diedrich Bader as Batman (Bruce Wayne) *
 * Lake Bell as Poison Ivy (Pamela Isley) / Cheryl *
 * Chris Meloni as Jim Gordon *
 * JB Smoove as Frank the Plant *
 * Alan Tudyk as Joker / Clayface (Basil Karlo) *
 * Matt Oberg as Kite Man (Charles Brown) *
 * Tony Hale as Doctor Psycho (Edgar Cizko) / Felix Faust *
 * Jason Alexander as Sy Borgman *
 * Ron Funches as King Shark (Nanaue) *

Notes:
 * 1) Kaley Cuoco, Lake Bell, Chris Meloni, JB Smoove, Alan Tudyk, Tony Hale, Jason Alexander, and Ron Funches are only credited for their respective episode appearances.
 * 2) Diedrich Bader is credited as a guest star in 1x02  while voicing trainer, who did not appear in the episode. Additionally, Bader is also only credited for his respective episode appearances.
 * 3) Matt Oberg is credited as a guest star in 1x01  while voicing Killer Croc and a banker, and as a series regular from 1x02  onwards while voicing Kite Man. Oberg is also only credited for his respective episode appearances.