First they came for Dumbo, but I said nothing, because I'm not an elephant.
Then they came for The Aristocats, and I said nothing because I'm not a cat.
Then they came for Kermit...
Viewers are greeted with the disclaimer: 'This programme includes negative depictions and/or mistreatment of people or cultures. These stereotypes were wrong then and are wrong now.
'Rather than remove this content, we want to acknowledge its harmful impact, learn from it and spark conversation to create a more inclusive future together.'
The warning is believed to refer to Muppet characters designed as stereotypes of Native Americans, Arabs and East Asians.
In another episode, the singer Johnny Cash plays on a stage adorned with the Confederate flag.