One of the most fun aspects of “Wedding Bell Blues” is spotting the subtle little appearances that Trelane makes in the episode when nobody is supposed to see him. While he mostly appears to the audience as actor Rhys Darby, through reflections we can see that characters on the show see him as a Vulcan waiter and as an Andorian wedding planner.
He also appears in other, even more subtle ways. Initially, Scotty detects a “sensor echo” on his transporter console. Trelane is also just barely visible in the window of Spock’s quarters. There is also shot of Starbase One where the camera zooms into one the biomes and the picture briefly shimmers as if the camera is traveling through space and entering the biome’s dome without being detected.
