Agents James West and Artemus Gordon meet with Professor McClennon to investigate his study on a recent rash of destructive tidal waves. But before the professor can provide answers, he is shot, leaving only one clue - a note to meet Dr. Pringle.
Aboard the Wanderer (their private train), Gordon examines the bullet that killed McClennon, while West searches the professor's hotel room for leads in his murder. Dr. Abigail Pringle, McClennon's associate, has the same idea and appears in McClennon's room to look for important papers. As the two search, shots ring out and Captain Philo, a fanatical marine-environmentalist, enters, demanding to know what the two are doing. Philo says he was invited to dinner by the now deceased McClennon and extends the offer to West and Pringle. West is suspicious and, retrieving a bullet fired from Philo's gun, discovers it is the same as the one that killed McClennon.
At dinner, Pringle incautiously explains that she knows all about McClennon's experiments and Philo kidnaps her, bringing her to his undersea laboratory. West finds a secret entrance to the lair but is captured by the captain, who explains how he creates the tidal waves and reveals his plan to destroy all the world's coastal towns as punishment for pollution of the seas.
This episode bears more than a passing resemblance to the James Bond 007 story The Spy Who Loved Me, which was later made into a 1977 movie starring Curt Jurgens as the fanatic bent on destroying the polluting world from his oceanic headquarters.
Directed by Irving Moore
Written by Michael Edwards
Philo: Alfred Ryder
Abigail: Judy Lang
* The above information was compiled from The Wild Wild West: The Series by Susan E. Kesler (Arnett Press), "Michael Garrison's Wild Wild West," an article by Robert Alan Crick in Epi-Log Journal #11 and other sources.