As a pre-TV child (television arrived in Calgary in the early 50s, about ten years after it appeared in the U.S.), radio dramas fed my imagination:  Boston Blackie; Suspense Theatre; and The Green Hornet come immediately to mind.  Though they provided the plot and dialogue, I was able to supply the images myself, far more dramatic than what any TV director could create.  In my young mind, Boston Blackie was the white knight in spite of a name that implied otherwise.  Evenings spent shivering in front of a radio, shivering from glorious fear and not cold.  The room crackling with drama—suspense.  And I was an important participant:  the program needed my imagination to give it life.