Stephanie Hsu
Dr. Sleech (voice) (8 eps)
Keke Palmer
Dr. Klak (voice) (8 eps)
Maya Rudolph
Dr. Vlam (voice) (8 eps)
Kieran Culkin
Dr. Plowp (voice) (8 eps)
Sam Smith
Dr. Azel (voice) (8 eps)
Natasha Lyonne
Nurse Tup (voice) (8 eps)
Greta Lee
(voice) (8 eps)
Andrew Dismukes
(voice) (7 eps)
Lennon Parham
(voice) (7 eps)
Gary Anthony Williams
(voice) (7 eps)
Bowen Yang
(voice) (6 eps)
Phil LaMarr
(voice) (5 eps)
Kemah Bob
(voice) (4 eps)
Abbi Jacobson
(voice) (4 eps)
Tracee Ellis Ross
(voice) (3 eps)
Jay Ellis
(voice) (3 eps)
Cirocco Dunlap
(voice) (3 eps)
Rory Culkin
(voice) (1 eps)
Macaulay Culkin
(voice) (1 eps)
Christian Culkin
(voice) (1 eps)
Shane Culkin
(voice) (1 eps)
Jessica Lowe
(voice) (1 eps)
John Waters
(voice) (1 eps)
Grey DeLisle
(voice) (1 eps)