The Scooby-Doo/Dynomutt Hour - Season 1 - Eps 8: The Day and Night Crawler
Blue Falcon and Dog Wonder encounter The Worm, an evil genius abetted by escaped convicts Bugsy Busby and helicopter thief Roto Chopper, seeking revenge against Big City. Swooping down on Big City Tech (scene of a freak accident years back when The Night Crawler, then Professor Ronald Hickman, was transmogrified from an intelligent scientist into a worm), The Blue Falcon and Dynomutt discover and try to stop the villains' attempt to pilfer a multimillion dollar computer. Despite a string of Dyno DumDums, The Daring Duo lure The Creepy Crawler and his even creepier cronies into a bizarre underground pursuit (where else would worms go?) and trick them into burrowing into Big City Prison.
About The Scooby-Doo/Dynomutt Hour

Title: The Scooby-Doo/Dynomutt Hour
First Air Date: 1976-09-11
Last Air Date: 1976-12-18
Status: Ended
Rating: 7.9/10 (from 167 votes)
Language: EN
Seasons: 2
Total Episodes: 32
Network: ABC
Genres: Animation, Comedy, Family, Kids, Mystery
Production Companies: Hanna-Barbera Productions
Synopsis
The Scooby-Doo/Dynomutt Hour is a 60-minute package show produced by Hanna-Barbera Productions in 1976 for ABC Saturday mornings. It marked the first new installments of the cowardly canine since 1973, and contained the following segments: The Scooby-Doo Show and Dynomutt, Dog Wonder.
Cast

Henry Corden
(voice)

Allan Melvin
Additional Voices (voice)

Casey Kasem
Shaggy Rogers / Additional Voices (voice)

Julie McWhirter
Additional Voices (voice)

Micky Dolenz
Supporting Voices / Additional Voices (voice)

Don Messick
Scooby-Doo / Additional Voices (voice)

Gary Owens
Blue Falcon (voice)

Virginia Gregg
Additional Voices (voice)

Larry McCormick
(voice)

Heather North
Daphne Blake (voice)