At the beginning Mr. Omir is shown using his newly discovered element 116, which he dubbed "Subterranium" (presumably because he discovered it while drilling on the ocean floor). At the time of this show there were only 104 known elements. Element 116 would be eventually discovered 35 years later and, after another 10 years of debate, officially named "Livermorium".
Captain Crane (played by David Hedison) calls Mr. Mr. Van Drutan at the Geophysical Institute for permission to shut down the drilling rig being run by Mr. Omir (James Darren). Van Drutan is played by Cec Linder who played Felix Leiter in the James Bond movie "Goldfinger." David Hedison later played Felix Leiter in "Live and Let Die" and "Licence to Kill." Hedison and Linder were not in the same shot, though they did share the same scene. And this match-up occurred years before Hedison was ever cast as Leiter.