Captain Nemo and the Underwater City

Captain Nemo and the Underwater City was a 1969 British film, featuring the character Captain Nemo and inspired by some of the settings of Jules Vernes novel Twenty Thousand Leagues Under the Sea. It was written by Pip and Jane Baker and starred Robert Ryan as Nemo.

Once safe aboard they are carried to a magnificent underwater domed city, TempleMir pronounced TempleMeer controlled by Nemo, there to remain for the rest of their natural livesThe survivors are made up of the brothers Barnaby and Swallow Bath Bill Fraser and Kenneth Connor, two gold hunting swindlers who lost a fortune in the shipwreck, along with Lomax Allan Cuthbertson, a claustrophobic and cowardly Englishman with a knowledge of engineering. There is Helena Beckett, an English widow travelling home with her son, played by Nanette Newman whilst the nominal leader of the group, Senator Robert Fraser Chuck Connors, is an emissary of the US Government en route to Britain on urgent government business. ........

Source: Wikipedia