Once upon a time, Toronto was a sleepy city. The atmosphere shut down at night. Red tape and cultural meekness kept things status quo. But through the 1970s and 1980s, the city's younger generations changed how things work—and one of the biggest players behind the scenes was Gary Topp.

A music promoter and independent movie theatre operator, it was Topp—along with his colleague, Gary Cormier, together known as the Two Garys—who first brought and promoted The Ramones, The Police, Slayer and other countercultural icons to Canadians for the first time. Topp also began operating the Roxy Theatre, an art deco building on the Danforth, for punk concerts and movie screenings that wouldn't be shown anywhere else in the country.

Last month, Topp's transformative career was printed in a coffee table book, He Hijacked My Brain: Gary Topp's Toronto, recalling legendary stories and performances from decades past. He joins his old friend Ralph Benmergui (who also grew up in Forest Hill, not far away) for a walk down memory lane in exploring his influence on the cultural fabric of the city—and what's changed in the music scene today.