Duncan Regehr brought a distinctive presence to Star Trek as the enigmatic Ronin in the Star Trek: The Next Generation episode "Sub Rosa." His portrayal of the mysterious lover linked to Dr. Beverly Crusher’s family history added a gothic twist to the series, standing out among the more typical sci-fi storylines. Fans remember Regehr’s Ronin as a charismatic figure blending charm with an almost supernatural aura, perfectly complementing the episode's setting on the Enterprise-D and its exploration of Captain Picard’s crew dynamics. While Regehr is primarily an actor, his work in this episode continues to resonate with fans who enjoy the mix of romance and mystery within the Star Trek universe. Outside Star Trek, Regehr is also known for his role as Zorro in the 1990s television series, but it is his turn in "Sub Rosa" that remains a memorable moment for the franchise, offering something markedly different during the heyday of The Next Generation’s run.