Knock Knock
| MPAA Rating: | NR |
| Genre: | Animation, Comedy, Family, Short |
| Country: | United States |
| Produced By: | Walter Lantz |
| Directed By: | Alex Lovy, Walter Lantz |
| Written By: | Lowell Elliot, Ben Hardaway |
| Cast: | Mel Blanc, Bernice Hansen, Sara Berner |
| In Theaters: | Nov 25, 1940 |
| Runtime: | 7 minutes |
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