Keith Diamond
Agent J (voice) (53 eps)
Charles Napier
Chief Zed (voice) (53 eps)
Gregg Berger
Agent K (voice) (40 eps)
Jennifer Lien
Agent Elle (voice) (40 eps)
Ed O'Ross
Agent K (voice) (13 eps)
Jennifer Martin
Agent Elle (voice) (13 eps)
Adam Baldwin
Agent X (voice) (13 eps)
David Warner
Alpha (voice) (3 eps)
Tony Shalhoub
Jeebs (voice) (2 eps)
Vincent D'Onofrio
Edwin Bug / Dung Bug / Moe Bug (voice) (1 eps)
Beth Broderick
Aileen (voice) (1 eps)
Kurtwood Smith
Forbus (voice) (1 eps)
Monica Allison
(voice) (1 eps)