[s16e16] Don't Fear The Roofer -
Makes a memorable appearance to provide "scientific" explanations for why Ray was invisible to others, including a localized black hole absorbing light between Bart and Ray. Fan Reception and Legacy
Despite multiple encounters, including a trip to the "Builder’s Barn," no one—not even Bart—witnesses Ray in person. [S16E16] Don't Fear the Roofer
"The Simpsons" Don't Fear the Roofer (TV Episode 2005) - IMDb [S16E16] Don't Fear the Roofer