Michael Keenan is an actor known for his role as Dr. Polaski in the Star Trek: The Next Generation episode "Sub Rosa." His portrayal brought a mysterious and unsettling presence to the Torrance family’s eerie storyline, exploring connections to the Federation’s past and the darker side of Starfleet culture. Working alongside Captain Jean-Luc Picard aboard the Enterprise-D, Keenan’s performance stands out in an episode that remains a fan topic for its gothic atmosphere. While Keenan’s broader acting career includes stage and television work beyond Star Trek, his contribution to "Sub Rosa" is a distinctive moment that showcases the franchise’s willingness to blend supernatural themes with science fiction drama.