Telly appears in episode #1575, when it's a very hot day on Sesame Street and everybody is in Mr. Hooper's store where it's air conditioned. At one point, Telly groans and Mr. Hooper asks,"What's the matter, Telly?" Hooper didn't say or do much in this episode except say that line and yell "Quiet!" when Oscar started making loud noises. I wonder if Mr. Lee was having problems at this point, for in this, and the season opener of 1981-82, his role is very small.
Ironically, in the season opener for 1982 (#1706), he looks unwell but talks alot. He also does not one but two songs on a current record album SESAME STREET SING ALONG (a verse in "Join Into the Game" and a duet with Ernie on "Take Me Out to the Ball Game"). Perhaps he knew his death was coming and wanted to do as much as he could before he wasn't able to...
HooperDusty