From Muppet Wiki

Alive from Off Center was a weekly arts anthology series, hosted by renowned performance artist Laurie Anderson, which aired on PBS from 1984 to 1987.

The series featured experimental short films by both up-and-coming and established directors. Comic actor Bill Irwin taped an episode titled As Seen on TV from 1987, in which he broke out of his reality and crossed into other television shows. Bert (Frank Oz) and Ernie (Jim Henson), and William H. Macy also appeared in the episode. Irwin would go on to play Mr. Noodle on Sesame Street eleven years later.