I wrote exactly once for TV, and don't think I ever saw the shows since they first aired...and, much to my surprise, they're now on YouTube.
It was a sketch-comedy series called On the Television -- best described as a cross between Mad TV and Siskel and Ebert -- done on a budget and shown on Nick at Nite. Short parodies of TV shows were interspersed with banter between two critics (one of whom was played by George McGrath, who created the show and asked me to contribute). Many of the cast went on to bigger careers, including Kathy Griffin, Lisa Kudrow, Mindy Sterling (hysterical in the Austin Powers movies), and Julia Sweeney, a really funny woman who was sorely misused on Saturday Night Live.
There's one clip on the site with my name on it that I don't remember writing (although I did recognize a couple of lines when I saw it), and the one I really do remember isn't up there (Julia as a teenage beach-volleyball player in an adult diaper commercial: "Sure I can control my bladder. But with my active schedule, why should I?").
But I definitely remember writing this -- "The Daddy/Daughter Global Universe Pageant":
I love George's delivery on "May I say in my eyes, all of you are winners. Of course, in the judges' eyes, most of you are losers." (And that's Julia as Miss USA in the blonde pageant wig.)