Rudy Behlmer hosts this 35-minute documentary. It's about Universal Studio's foray into the monster movie genre in the early 1930s. The studio was the leader in this field. It had two early smash hits in "Frankenstein" of 1931 and "The Invisible Man" of 1933. This film has interviews with a number of film historians, actors and others.
This bonus featurette has interviews with a number of film historians, actors and others. It shows how the invisibility was achieved for the invisible man. The documentary is very interesting and well done. It makes a good addition for a film library. Universal made this documentary to go with the movie DVD that went on sale after 2000.
The technology was masterful in its day and appears more real than CGI could make things today. Of course, that's because it was real. It was just done with the use of different camera shots, backgrounds, etc. Watch this documentary to see and learn how it was done.