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| Sierra Madre Locations |
| Belden & Westshire Drives, Hollywood Hills |
| Hollyridge Drive, Hollywood |
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| The exterior back and interior hallways and stairwell were filmed in an office building in Hollywood. The front exterior was in Sierra Madre. |
| The stairs they are walking down exit out onto the street at right. The door on the far right is where they would have exited, but today it is 1 single door, not a pair of swinging doors. |
| PICTURE OF THE ALLEY TODAY COMING VERY SOON |