LOS ANGELES — James Comisar is the first to acknowledge that more than a few have questioned his sanity for spending the better part of 25 years collecting everything from the costume George Reeves wore in the 1950s TV show ‘‘Adventures of Superman’’ to the entire set of ‘‘The Tonight Show Starring Johnny Carson.’’

Then there’s the pointy Spock ears Leonard Nimoy wore on ‘‘Star Trek’’ and the guns Tony Soprano used to rub out a mob rival in an episode of ‘‘The Sopranos.’’