Tar Pit
Encyclopedia
"Tar Pit" is the first episode of the second season of the 1975 American television series Land of the Lost
Land of the Lost (1974 TV series)
Land of the Lost is a children's television series co-created and produced by Sid and Marty Krofft. During its original run, it was broadcast on the NBC television network....

. Written by Margaret Armen and directed by Gordon Wiles
Gordon Wiles
Gordon Wiles was an American art director and film director. He won an Academy Award for Best Art Direction for the film Transatlantic.He was born in St. Louis, Missouri.-Selected filmography:* Transatlantic...

, it first aired in the United States on September 6, 1975 on NBC
NBC
The National Broadcasting Company is an American commercial broadcasting television network and former radio network headquartered in the GE Building in New York City's Rockefeller Center with additional major offices near Los Angeles and in Chicago...

.

Plot

Cha-Ka is painting a picture of Ta with the help of Sa on a rock by the tar pit
Tar pit
A tar pit, or more accurately known as an asphalt pit or asphalt lake, is a geological occurrence where subterranean bitumen leaks to the surface, creating a large area of natural asphalt.-Known tar pits:...

. Meanwhile, while playing with Dopey, Spot falls into the pit. Dopey tries to join him and falls on a broken rock in the pit. The two dinosaurs pine for help and Cha-Ka discovers them, forgoing his painting to Ta's chagrin.

Cha-Ka runs for help while Spot escapes, leaving Dopey. Will, Holly, and Rick fashion a lasso to save the apatosaur. Dopey proves to heavy, however, and the lariat breaks. Will and Rick begin building a pulley system to make use of mechanical advantage
Mechanical advantage
Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system. Ideally, the device preserves the input power and simply trades off forces against movement to obtain a desired amplification in the output force...

, and Cha-Ka goes to recruit Ta and Sa in the operation.

Sa has taken over the painting of Sa, but is only making it worse. When Cha-Ka arrives, he convinces Ta (and Sa) to help on the condition that afterward he will complete the portrait. Will and Rick complete their pulley, but it falls apart on the first try. Ta and Sa leave, taking Cha-Ka with them. The Marshalls give up on Dopey but nonetheless camp out beside the apatosaur.

That evening Cha-Ka leads Emily to the tar pit, and Rick ties Dopey's rope around Emily's neck. When Emily refuses to leave, Will and Rick use torches to scare her away, causing her to pull Dopey out of the pit.
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