Sesame Street Episode #15.10 (1969– ) Online
While playing with his teddy bear, Newton, Dr. Nobel Price observes that when he drops him, he falls down rather than up or to the side. Olivia then explains the laws of gravity to him.
| Episode credited cast: | |||
 | Emilio Delgado | - | Luis |
 | Jim Henson | - | Ernie / Kermit the Frog / Guy Smiley (voice) |
 | Gregory Hines | - | Himself |
 | Maurice Hines | - | Himself |
 | Richard Hunt | - | Gilbert / Don Music / Lead Beetle (voice) |
 | Sonia Manzano | - | Maria |
 | Bob McGrath | - | Bob |
| Brian Muehl | - | Dr. Nobel Price / Barkley (voice) |
 | Jerry Nelson | - | The Count / Herry Monster / Mr. Johnson / Newsboy / Announcer (voice) |
 | Roscoe Orman | - | Gordon |
 | Frank Oz | - | Bert / Grover (voice) |
 | Alaina Reed-Hall | - | Olivia (as Alaina Reed) |
 | Martin P. Robinson | - | Sullivan (voice) |
 | Caroll Spinney | - | Oscar the Grouch / Big Bird (voice) |