For the first eight seasons of MST3K (1 at KTMA and 7 on Comedy Channel/Comedy Central), Beaulieu wrote for the show, operated and voiced the Crow T. Robot puppet, and played the role of Dr. Clayton Forrester, the head mad scientist at Gizmonic Institute.

[2] Pearl Forrester (Mary Jo Pehl) replaced him as the head mad scientist and Bill Corbett took over the voicing and operation of Crow.

[3][2][4] In 2002, he was the head writer, producer, and host of the pilot episode of the Animal Planet show People Traps.

Called Cinematic Titanic, it featured several former MST3K cast and crew members: Beaulieu, J. Elvis Weinstein, Frank Conniff and Mary Jo Pehl.

In the midst of the COVID-19 pandemic, Beaulieu and Conniff moved the show to a ticketed livestream format, offering monthly live-riffs of movies, including some they had previously screened on tour such as Glen or Glenda, The Tingler, and Walk The Dark Street.