4 user

The Secret of Shark Island 

The gang meet Sonny and Cher. After being stranded on shark island, the gang decide to investigate the mysterious disappearance of a freight ship.


Jameson Brewer (story), Tom Dagenais (story) | 11 more credits »




Episode credited cast:
Don Messick ... Scooby-Doo (voice)
Casey Kasem ... Shaggy (voice)
Frank Welker ... Fred (voice)
Heather North ... Daphne (voice)
Nicole Jaffe ... Velma (voice)
Rest of cast listed alphabetically:
Sonny Bono ... Sonny Bono (voice)
Daws Butler ... (voice)
Cher ... Herself (voice)
Henry Corden ... (voice)
Joan Gerber Joan Gerber ... (voice)
Florence Halop ... (voice)
Larry Harmon Larry Harmon ... (voice)
Pat Harrington Jr. ... (voice) (as Pat Harrington)
Ann Jillian ... (voice)
Ted Knight ... (voice)


The gang meet Sonny and Cher. After being stranded on shark island, the gang decide to investigate the mysterious disappearance of a freight ship.

Plot Summary | Add Synopsis

Plot Keywords:

shark | See All (1) »







Release Date:

28 October 1972 (USA) See more »

Company Credits

Show more on IMDbPro »

Technical Specs

Sound Mix:

Mono (RCA Sound Recording)



Aspect Ratio:

1.33 : 1
See full technical specs »

Did You Know?


When Cher asks to look at the brochure when Sonny mentions golf, "Hideaway Hotel" on the brochure is misspelt "Hideway Hotel". See more »


Sonny Bono: [Cher stomps her foot and the resort falls into the ocean] That's my little Indian Sphinx, when she brings down the house, she REALLY brings down the house.
See more »


Featured in One Hit Wonderland: Lullaby by Shawn Mullins (2014) See more »

Frequently Asked Questions

This FAQ is empty. Add the first question.

User Reviews

The Secret of Shark Island
20 December 2013 | by Michael_ElliottSee all my reviews

The New Scooby-Doo Movies (1972)

"The Secret of Shark Island"

The Mystery Inc. gang are driving through a rain storm when they pass Sonny and Cher who are stranded on the side of the road. The famous couple jump into the van and everyone heads to a hotel, which is broken down to say the least. They learn that there are some mysterious sharks that circle the hotel and soon there's a mystery to be solved. The Secret of Shark Island is yet another rather disappointing entry in the series that manages to have no mystery, very few laughs and really not too much working for it. There are several problems here but the majority can be blamed on the script, which really doesn't offer up anything in terms of entertainment. The laughs are pretty much missing and this includes the constant back and forth between Sonny and Cher. Their one-liners are all pretty bad and there's just no chemistry between the two. The gang really doesn't add any laughs either, although Scooby gets a couple good lines scattered throughout the running time. The actual mystery is also pretty bland because it's quite obvious who the bad guy is and the costumes of the sharks just aren't used enough.

Episode: C

0 of 1 people found this review helpful.  Was this review helpful to you? | Report this
Review this title | See all 4 user reviews »

Contribute to This Page

Stream Action and Adventure Titles With Prime Video

Explore popular action and adventure titles available to stream with Prime Video.

Start your free trial

Recently Viewed