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60 mins
22/09/1977
1.
Melt Down
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Schubert threatens to cause world wide flooding by using powerful microwaves to melt the earth's polar ice caps unless the government turns Mark Harris over to him.
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60 mins
13/10/1977
2.
The Mudworm
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When a multi-million dollar underwater probe malfunctions and begins attacking any ship that travels near it, Mark must reason with its highly advanced brain and convince it to stop.
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Director:
Virgil Vogel
Writer:
Alan Caillou
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Guest starring:
Richard Williams, Robert Lussier,
Victor Buono, Duncan Gamble, Jack Somack, Brandyn Artise, Jean Marie Hon, J. Victor Lopez
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60 mins
18/10/1977
3.
Hawk of Mu
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Mark, investigating a power outage, discovers a centuries old hawk statue from the legendary civilization of Mu. The statue, when used properly, can remove the power from a large area. Schubert discovers the power of the hawk statue and Mark must prevent him from taking it.
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Director:
Harry Harris
Writer:
David H. Balkan
/ Luther Murdoch
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Guest starring:
Carole Mallory, Vicky Huxtable, Sydney Lassick
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60 mins
25/10/1977
4.
Giant
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The oceans are leaking through a fissure in the ocean floor. A conman named Muldoon agrees to guide Mark through the fissure to investigate. However, Mark is unaware that giants inhabit the other side of the fissure and Muldoon has already stolen gold from one of them.
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Director:
Richard Benedict
Writer:
Michael Wagner
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Guest starring:
Ted Neeley, Kareem Abdul-Jabbar, Gene LeBell, John Dennis
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60 mins
01/11/1977
5.
Man O'War
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Using his genetic scientists, Schubert produces a giant jellyfish which he intends to release unless his extortion demands are met.
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60 mins
08/11/1977
6.
Shoot Out at Land's End
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Mark is somehow linked with a man named Billy, existing in a wild west town, who appears to be his twin. Investigating, Mark arrives in the town and discovers Billy had the same webbing as Mark but has had it removed.
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60 mins
22/11/1977
7.
Crystal Water, Sudden Death
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Schubert attempts to make a satellite weapon to knock out the Earth's communications. However, to power the weapon he needs the energy crystals protected by a forcefield under the ocean. The crystals actually power the forcefield that protects an underwater city.
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Director:
David Moessinger
Writer:
Larry Alexander
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Guest starring:
Whitney Rydbeck, Flip Reade, Tina Lennert, Rozelle Gayle,
Rene Auberjonois
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60 mins
06/12/1977
8.
The Naked Montague
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An underwater landslide transports Mark to Verona, Italy ... in the days of Romeo and Juliet.
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60 mins
13/12/1977
9.
C.W. Hyde
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C.W. develops a Jekyll and Hyde personality after swallowing a mysterious liquid.
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Director:
Dann Cahn
Writer:
Stephen Kandel
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Guest starring:
Pamela Peters Solow, Michele Carey,
Val Avery
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60 mins
18/04/1978
10.
Scavenger Hunt
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Mark encounters Muldoon, who is using a sea monster to make island natives sacrifice young girls to him.
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Director:
David Moessinger
Writer:
Peter Allan Fields
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Guest starring:
Eugenia Wright, Yabo O'Brien, Tony Urbano,
Ted Cassidy,
Ted Neeley, Peter Kwong
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60 mins
25/04/1978
11.
The Imp
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An impish little man enters an underwater station and causes the crew to become irrational simply by touching them. After three crewmen die the F.F.O.R. hears Duke, the last crewman talking, over the radio in a childish manner and investigates. Mark swims over and brings Duke over to the Cetacean, not knowing the imp has stowed aboard.
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Director:
Paul Krasny
Writer:
Shimon Wincelberg
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Guest starring:
Pat Morita, Lyman Ward, Mel Scott,
Dick Gautier
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60 mins
02/05/1978
12.
The Siren
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While investigating the mysterious loss of three ships in one part of the ocean, Mark and the crew of the Cetacean encounter a submarine operated by a modern day pirate. The pirate has captured a mermaid that can produce a hypnotic siren song, which mesmerizes anyone who hears it, even Mark.
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Director:
Edward M. Abroms
Writer:
Michael Wagner
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Guest starring:
Carol Miyaoka, Lisa Richards, Timothy Scott, Laurette Spang, Michael Strong, Neville Brand,
Colleen Camp
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60 mins
06/06/1978
13.
Deadly Carnival
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Mark goes undercover to investigate members of a carnival planning to break into a museum. The only way to break into the museum is through an underwater tunnel of which only Mark can swim. When he is approached, he refuses. The owner of the carnival is then kidnapped and threatened unless Mark helps.
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Director:
Dennis Donnelly
Writer:
Larry Alexander
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Guest starring:
Anthony James, Sharon Farrell,
Billy Barty, Donna Garrett
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