
When a scientist is offered a month‑long stay in a cutting‑edge simulated underwater habitat, he convinces his family to join the experiment. After moving into the high‑tech subaquatic residence, unexpected malfunctions trigger chaotic underwater mayhem, forcing them to confront the dangers of living beneath the waves.
Does Hello Down There have end credit scenes?
No!
Hello Down There does not have end credit scenes. You can leave when the credits roll.
See current US streaming, rental, and purchase options for Hello Down There (1969) via JustWatch.
Explore the complete cast of Hello Down There, including both lead and supporting actors. Learn who plays each character, discover their past roles and achievements, and find out what makes this ensemble cast stand out in the world of film and television.

Richard Dreyfuss
Harold Webster

Lee Meredith
Dr. Wells

Janet Leigh
Vivian Miller

Merv Griffin
Himself

Ricou Browning

Arnold Stang
Jonah

Jim Backus
T.R. Hollister

Bruce Gordon
Adm. Sheridan

Roddy McDowall
Nate Ashbury

Ken Berry
Mel Cheever

Tony Randall
Fred Miller

Harvey Lembeck
Sonarman

Charlotte Rae
Myrtle Ruth

Lou Wagner
Marvin Webster

Kay Cole
Lorrie Miller

Andy Jarrell
Radioman

Frank Schuller
Alan Briggs

Frank Logan
Captain

Charles G. Martin
Chief Petty Officer

Pat Henning
Reilly

Lora Kaye
Secretary

Henny Backus
Mrs. Webster

Bud Hoey
Mr. Webster

Gary Tigerman
Tommie Miller

Jay Laskay
Philo
Discover where to watch Hello Down There online, including streaming platforms, rental options, and official sources. Compare reviews, ratings, and in-depth movie information across sites like IMDb, TMDb, Wikipedia or JustWatch.
Read the complete plot summary of Hello Down There, including all major events, twists, and the full ending explained in detail. Explore key characters, themes, hidden meanings, and everything you need to understand the story from beginning to end.
Fred Miller [Tony Randall] must prove that his new design for an underwater home is viable by convincing his family to live in it for 30 days. His son Tommie Miller [Gary Tigerman] and daughter Lorrie Miller [Kay Cole] are members of an emerging rock band, and they invite the two other band members to live with them during the experiment. Their temporary home, which Miller dubs the Green Onion, sits 90 feet below the surface of the ocean and is equipped with modern appliances and amenities for Vivian Miller [Janet Leigh], all designed by Miller. A large opening in the floor provides direct access to and from the sea.
The group are soon joined by a live-in seal named Gladys and a pair of dolphins that stay close at hand and fend off sharks. They are confronted by many obstacles, including a rival designer from Undersea Development, Inc. who begins to cause trouble. Meanwhile, the band’s single has gotten the attention of record executive Nate Ashbury [Roddy McDowall], who wants to sign them. He books them for a televised performance on The Merv Griffin Show without first communicating with them. After learning that they are living under the sea, he schemes to bring Griffin and the TV crew down to the Green Onion, but the navy is alerted to the sound of the music and becomes suspicious.

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