Actor Dennis Quaid tells PEOPLE he ultimately agreed to play serial killer Keith Jesperson in 'Happy Face' because the Paramount+ series is "dedicated to the victims" of the Happy Face Killer's murders.

Annaleigh Ashford plays a TV makeup artist whose dad is notorious serial killer Keith Hunter Jesperson in the eight-episode season.

It's often said that television is a writers' medium, but that's because scripts are a delivery device for the format's true lifeblood: plot. However interesting a project's themes may be, it requires structure and momentum to propel the action multiple episodes.