A compendium of all the little ads exhibitors could run to build up interest in the picture. Problem: it wasn't called "IF."

"The Unknown Purple"? Really. As opposed to all the purples that were known quantites I guess. Roland West's name was already attached to thrillers, it seems - he'd only get more famous for the spine-tingler genre.

Until he got very famous for a mystery much more interesting than anything in his movies . . .