| "Headache" | |
|---|---|
| Grimm episode | |
| Episode no. | Season 4 Episode 21 |
| Directed by | Jim Kouf |
| Written by | David Greenwalt Jim Kouf |
| Featured music | Richard Marvin |
| Cinematography by | Fernando Arguelles |
| Editing by | George Pilkinton |
| Production code | 421 |
| Original air date | May 8, 2015 |
| Running time | 42 minutes |
| Guest appearances | |
| |
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"Headache" is the 21st episode of season 4 of the supernatural drama television series Grimm and the 87th episode overall, which premiered on May 8, 2015, on NBC. The episode was written by series creators David Greenwalt and Jim Kouf and was directed by Kouf, making his directorial debut in the series.