Silent Witness: The Complete Season Twenty One
| Film | Silent Witness |
| Format | 3× DVD-R |
| Region | 1 |
| Runtime | 502 minutes |
| Audio | Dolby Digital 5.1 |
| Subtitles | English SDH |
| Languages | English |
| Aspect Ratio | 16:9 |
| Color | Color |
| Video Standard | NTSC |
| Packaging | Keep case |
| Barcode | 8 83929 67272 1 |
| Brand | BBC |
| Copyright | BBC Studios Americas Inc. |
| Copyright [Package Design] | BBC Studios Americas Inc. |
| Copyright [Program] | British Broadcasting Corporation |
| Territory | United States, Canada |
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