Season 11 - BABF02 - Hello Gutter, Hello Fadder

Hi, Maggie! I'm Homey-Womey, the Teletubby and I'm all man, in
case you heard otherwise. Let's see what's on tummy-vision!

Homer dress up like Tinky Winky. "all man" is a reference to the suspicion that Tinky Winky is gay - which has resulted in great controversy.

Season 11 - BABF11 - Missionary: Impossible
The Teletubbies is a part of the crowd that's chasing Homer in this episode.
Season 11 - BABF14 - Days of Wine and D'Oh'ses

Bart, Lisa and Maggie watch the Teletubbies at home.

Gaa Gaa (gently): Hurt everyone!
Lisa: Did Gaa Gaa just say, 'hurt everyone'?
Bart (laughing): Gaa Gaa - cute name.

Season 12 - CABF01 - Lisa the Tree Hugger
The Simpsons are dressed up as teletubbies in the couch gag to this episode.
Season 13 - DABF10 - Blame it on Lisa
In Brazil, Bart comes across a questionable tv-program for children called "Teleboobies."
Season 14 - EABF06 - Pray Anything
The claw-grip machine contains a plush Dipsy.
Season 14 - EABF09 - Mr. Spritz Goes to Washington
One of Maggie's toys is a plush Po.
Season 15 - FABF03 - Marge vs. Singles, Seniors, Childless Couples and Teens, and Gays
  The Teletubbies are at the Ruffi concert.
Thanks to SNPP's Teletubbies guide and