Theatre of the Mind is the first studio album by the Canadian rock band Mystery. It is also the first album to be released on Michel St-Père's record label Unicorn Digital, which was created to promote this album. There was a major lineup shift following the release of this album - not only was it the last Mystery album to feature Richard Addison and Stéphane Perreault, it was also the only album to feature Michel Painchaud and the last album until 2010 to feature Benoît Dupuis.