Professor Television is a recurring Sesame Street segment, featuring Bill Irwin as the title character. The skits usually involved the professor demonstrating words, which always end in disaster.
| Picture || Theme || Earliest known apearance || Description
|| Open and Closed
|| Episode 3656
|| Professor Television tries to demonstrate open and closed, but his efforts backfire when the door does the opposite of what the sign says. So, he just puts up a sign saying "Nevermind".
|| Near and Far
|| Episode 3683
|| Professor Television tries to demonstrate near and far, with help from Maria's voice.
|| Episode 3713
|| Professor Television tries to demonstrate "Danger" by putting a "Danger" sign above a deep drop. The sign falls, however, so he gets a large flashing "Danger" sign, which traps him.