John E. Kennedy

John Travolta

Charlie

Dave Goelz

Gonzo / Dr. Bunsen Honeydew / Waldorf / The Birdman (voice)

Kirk Cameron

Mr. Kirk

Robin Williams

Dan

Steve Whitmire

Kermit the Frog / Rizzo the Rat / Beaker / Cosmic Fish #1 /

Leigh-Allyn Baker

Creative Leigh / Voice of M.A.P.L.E.