(1 episode)

Dr. Donald 'Ducky' Mallard (1 episode)

Isaac's Bandmate (2 episodes)

Dr. Shinewell (2 episodes)

Greg (23 episodes)

Wojciech

Connor Tate (1 episode)

Logan Beekman (4 episodes)

Mike

Young Donald Mallard (4 episodes)

Ron (13 episodes)

Voice of the Machine

Graham (1 episode)

Tony Rigby (4 episodes)

Ken Haskins (1 episode)

Gideon

Will

Arty Party (1 episode)

Trent (1 episode)

Brian (1 episode)

Cal Vandeusen (13 episodes)

Mick

Peter

Andy McTeer

Grant Funkyerdoder