The Supremes (Cindy Birdsong, left, Diana Ross and Mary Wilson) were guest stars on NBC’s Tarzan TV series starring Ron Ely in 1968. The episode was called “The Convert.”

It was Ron Ely himself who posted the clip, which also features James Earl Jones as a tribal chieftain.
 

 
Via the mighty WFMU

 
In other words, “Darth Vader recites the alphabet on Sesame Street.” Who knew the alphabet could be so intense?

And if that wasn’t enough for you, here’s James Earl Jones counting to 10.
 

 
(via IHC)