Revulsion is a solid episode elevated by a superb guest performance.
The most notable aspect of Revulsion is the guest appearance of veteran character actor Leland Orser. Orser’s screen presence is striking, making an impression with supporting role in high-profile films from The Bone Collector to se7en to Alien Resurrection to Daredevil. He has also worked reliably in television, holding down regular roles in shows like E.R. and Berlin Station, while recurring in series like 24 and Ray Donovan. To modern audiences, he is likely recognisable got his work as a fixture of the Taken franchise.
Even within the Star Trek franchise, Orser is very much a recurring fixture. While never a steady player like J.G. Hertzler or Jeffrey Combs, Orser made quite an impression. He played the changeling posing as Tal Shiar operative Colonel Lovok in The Die is Cast on Star Trek: Deep Space Nine, making the most of a rather minor role in one of the series’ most memorable two-part episodes. He would also do good work as the venal Loomis in the otherwise disappointing Carpenter Street during the third season of Star Trek: Enterprise.
However, his guest appearance in Revulsion on Star Trek: Voyager remains his most distinctive turn in the franchise. Playing Dejaren, a psychotic and fragmented hologram who murdered his crew, Orser singlehandedly elevates would could easily be a tired genre exercise. Revulsion is a solid episode, but one that sticks in the memory almost entirely due to the casting.