Karl's antics continue this week, in the "Shower Party" episode. This also begins a period of controversy for the show, resulting in disclaimers later in the series.
I do want to go on the record as saying that Karl was by himself in the shower. The "shower girls" you hear in this episode (played by Sandra Kressley and Lisa Quoresimo) are safely outside. Sorry to destroy the illusion of radio.
You will also hear other voices, who I am guessing are P.D. Gregg and Andy Schrum among others. You're heard Andy guest star on a few of the SF podcasts.
Enjoy the show and a promo.