Ralph S. Singleton
| Born | 1940-03-22, United States |
| Links | https://www.imdb.com/name/nm0802326/?ref_=ttfc_fc_cr19 |
Director 1
 | Graveyard Shift | Feature Film | 1990 |
Second Assistant Director 1
 | The Sentinel | Feature Film | 1977-01-07 |
Added by marco.leistner1
| Born | 1940-03-22, United States |
| Links | https://www.imdb.com/name/nm0802326/?ref_=ttfc_fc_cr19 |
| Graveyard Shift | Feature Film | 1990 |
| The Sentinel | Feature Film | 1977-01-07 |