Regehr played the title character in Zorro, The Family Channel's television series based upon Johnston McCulley's classic hero.

[4] After numerous appearances in Canadian theatre, television (e.g., in the family TV show Matt and Jenny on the Wilderness Trail),[5] and notable roles on radio for the CBC, he and his wife, Catherine, moved to Los Angeles, California, where he began to develop his work in film.

[6]: 1187  He went on to star in many more US television films, including the 1984 television mini-series The Last Days of Pompeii, as Lydon, the gladiator;[3] as Errol Flynn in the 1985 CBS film My Wicked, Wicked Ways, based on the autobiography of Flynn; and on the science fiction series V as the Visitor military leader Charles.

He was a guest actor on Cybill, Murder, She Wrote, Hotel and the seventh-season Star Trek: The Next Generation episode "Sub Rosa" as Ronin, a ghost who falls in love with Beverly Crusher.

Regehr's automonograph, The Dragon's Eye: An Artist's View, received international acclaim and was lauded by art critics and literary reviewers as a book of visual and poetic excellence.