Evil lurks in the gloomy house at Markham Manor where a deranged Sir Edward is the chained prisoner of his brother Julian. When Sir Edward escapes, he embarks on a monstrous killing spree, determined to seek revenge on all those whom he feels have double-crossed him.
| Release Date | June 11, 1969 | |
|---|---|---|
| Status | Released | |
| Original Title | The Oblong Box | |
| Runtime | 1h 36min | |
| Budget | $175,000 | |
| Revenue | — | |
| Language | English | |
| Original Language | English | |
| Production Countries | United Kingdom | |
| Production Companies | American International Pictures | |