Oliver Senton (photo from official website).
The Nutopia event I posted about yesterday was done to celebrate the publiction of Daisy Campbell's Cosmic Trigger the Play book by Hilartitas Press. The video of the event includes scenes from the play and two musicial numbers from it, so with the video and the color photos in the new book, it's possible to go beyond the script and get an idea of what a performance was like.
And if you enjoyed Oliver Senton's performances in the video as Robert Anton Wilson, don't forget there are audiobooks of his readings of the first two Cosmic Trigger books. (Information here, and also here. )