One of the coolest things about Sesame Street that will attract viewers of all ages is their clever parody sketches.
Take for example this 1973 offering. Can't say for sure if this is from season 4 or 5. Anyway, Dragnet gets the parody treatement, as we're introduced to Sgt. Thursday (Jerry Nelson), who's searching for the letter W, but, as we'll see, it's not as easy as you'd think......
We get the joke.