"You Don't Know Jack" | |
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Grimm episode | |
Episode no. | Season 4 Episode 20 |
Directed by | Terrence O'Hara |
Written by | Sean Calder Michael Golamco |
Featured music | Richard Marvin |
Editing by | Scott Boyd |
Production code | 420 |
Original air date | May 1, 2015 |
Running time | 42 minutes |
Guest appearances | |
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"You Don't Know Jack" is the 20th episode of season 4 of the supernatural drama television series Grimm and the 86th episode overall, which premiered on May 1, 2015, on the broadcast network NBC. The episode was written by Sean Calder and Michael Golamco and was directed by Terrence O'Hara.