| Release Date | October 7, 1970 | |
|---|---|---|
| Status | Released | |
| Original Title | Underground | |
| Runtime | 1h 40min | |
| Budget | — | |
| Revenue | — | |
| Language | English | |
| Original Language | English | |
| Production Countries | United Kingdom, United States of America | |
| Production Companies | United ArtistsLevy-Gardner-LavenBrighton Pictures | |