'Diana' orders a White Lady from the ship's bar. White Lady is a classic cocktail that's part of the sour cocktails family---mixed drinks made of liquor, citrus, and sweetener. It's also called a 'Delilah' or 'Chelsea Sidecar.' It's like a gin version of a Sidecar. Its recipe calls for Gin, Triple sec or Cointreau, and lemon juice with optional egg white foam. They served it in a martini glass.
John Howard makes a joke about Shangra-La. Five years earlier, Howard starred in the 1937 movie Lost Horizon which largely takes place in Shangra-La.
According to studio Isle of Missing Men (1942)'s billing sheets, Noah Beery was originally cast as "Captain Sanchez." According to a Hollywood Reporter news item, John Litel was originally cast as "Doc Brown," but withdrew from the production due to a scheduling conflict.
Isle of Missing Men (1942) was made by Richard Oswald for the Poverty Row studio Monogram Pictures. Oswald was an exiled Austrian director who had fled Germany when the Nazis came to power going back to Austria, then to the Netherlands, to France and finally to Hollywood where he made a handful of films. His son, Gerd Oswald, was assistant director and later went on to a career as a well-regarded director himself.
Gilbert Roland, who played bad-boy Dan 'Curtis,' was a popular romantic lead in the Silent Era. He spent the 1930s and 1940s starring in B-movies including six pictures in the Monogram Cisco Kid series beginning with The Gay Cavalier (1946).