|Plot||Sam the Machine becomes a time machine.|
|Air date||April 30, 1973|
|Season||Season 4 (1972-1973)|
|Sponsors||K, M, 2|
- Oscar makes grouchy plans for a yucky Grouch party.
- Sam the Machine becomes a time machine.
- David sorts things to clean the house.
- Big Bird tries to find a use for a "snuffle-rest".
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|Episode 0515||Episode 0517|