John Stephenson
Mr. Slate (voice) (9 Episodes), Doctor / Announcer (voice) (2 Episodes), Hailstone / Mailman / Ringmaster (voice) (1 Episode), Mr. Slate / Dr. Ben Cavity / Sponsor / Guy #1 / Turtle (voice) (1 Episode), Mr. Slate / Charlie / Principal / Announcer (voice) (1 Episode), Mr. Rockhead / O'Shale / Hot Dog Vendor (voice) (1 Episode), Doctor / 2nd Doctor (voice) (1 Episode), Mr. Slate / Cowboy / Professor (voice) (1 Episode), B.J. / Guy #1 / Al / Guy #3 / Frank (voice) (1 Episode), Rockbound / Chef / Agent (voice) (1 Episode), Sam (voice) (1 Episode), Narrator / F.M. / Boss / Guy #2 / Stonehead (voice) (1 Episode), Mr. Slate / Cop / Actor #1 / Actor #3 (voice) (1 Episode), Joe Rockhead / Andre / Barker / Man #1 (voice) (1 Episode), Rock Quarry (voice) (1 Episode), Annoucer / Chairman / Guy / Charlie (voice) (1 Episode), Director / Announcer (voice) (1 Episode), Mr. Bourter / Charlie / General / Sergeant / Guy #1 (voice) (1 Episode), Mr. Slate / Catcher / Umpire / Casey / Guy #2 (voice) (1 Episode), Mr. Slate / Man #2 / Scoutmaster (voice) (1 Episode), Scat / Rockwell (voice) (1 Episode), Mr. Slate / Charlie / King / Man #3 (voice) (1 Episode), Mr. Slate / Arnold's Father / Coach (voice) (1 Episode), Driver / Maitre d' / Indian (voice) (1 Episode), Mailman / Joe Rockhead (voice) (1 Episode), Photographer #3 / J.J. Granite / Kid (voice) (1 Episode), Joe Rockhead (voice) (1 Episode), Mr. Slate / Shystone / Fish (voice) (1 Episode), Larry Lava / C.W. Crater / Goldrock / Joe (voice) (1 Episode), Mr. Slate / Card Player #1 (voice) (1 Episode), Mr. Slate / Mr. Vanderock (voice) (1 Episode), Sandford (voice) (1 Episode), Mailman / Mailman #2 / Mr. Slate / Chief of Police (voice) (1 Episode), Mr. Slate / Pierre / Mediator / Butler (voice) (1 Episode), Joe Rockhead / Emcee / Guy #2 / Cheers (voice) (1 Episode), Harlie / Old Man / Sergeant / Radio Announcer (voice) (1 Episode), Mr. Slate / Stony (voice) (1 Episode), Attendant / Tiberius / Nero / Arthur / Astronomer / Cop (voice) (1 Episode), Stan / Sam / Mac (voice) (1 Episode), Fingers / Sarge / Announcer / Attendant (voice) (1 Episode), German Doctor / Intern (voice) (1 Episode), Mr. Slate / Charlie / Announcer / Guy #1 (voice) (1 Episode), TV Announcer / Butler / Cop / Reporter #2 / News Reader (voice) (1 Episode), Mr. Slate / Pelican (voice) (1 Episode), Mr. Slate / Rocky / TV Announcer / Flagman (voice) (1 Episode), Sam / Announcer (voice) (1 Episode), Boss Rockhead / Cop / Announce (voice) (1 Episode), Spike / Butler / 1st Man / Cop #3 (voice) (1 Episode), Mr. Slate / Announcer (voice) (1 Episode), Cop #1 (voice) (1 Episode), Perry Gunite / Jeweler (voice) (1 Episode), Policeman (voice) (1 Episode), Mr. Slate / Hat Bird / Man #3 (voice) (1 Episode), Harvey Millrocks / Mailman / Editor (voice) (1 Episode), Mr. Slate / Wrathrock / Wig Man (voice) (1 Episode), Mike / Captain / Announcer (voice) (1 Episode), Grand Poobah / Doc / Mailman / Driver (voice) (1 Episode), Mr. Slate / Doc / Hammerslag (voice) (1 Episode), Joe / Foreman / Egg / Porcupine / Governor / Agency Man (voice) (1 Episode), Mr. Slate / Sarge / Dr. Firma (voice) (1 Episode), Mr. Slate / Mr. Rockhead / Buffalo / Minister #3 (voice) (1 Episode), Emery / Mr. John Sludge / Announcer (voice) (1 Episode), Mr. Slate / Fireman (voice) (1 Episode)
