British inventor Harry Grindell Matthews demonstrates what he claims to be a directed energy weapon which has the potential to revolutionise warfare forever.
| Actor | Role |
|---|---|
| HHarry Grindell MatthewsHimself | Himself |
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British inventor Harry Grindell Matthews demonstrates what he claims to be a directed energy weapon which has the potential to revolutionise warfare forever.
| Actor | Role |
|---|---|
| HHarry Grindell MatthewsHimself | Himself |