Draining Alcatraz:..

Channel 5

Thursday 16 July 2020  23:30 - 00:30 (60 mins)
...The Impossible Escape. Visual effects 'drain' the waters around the prison of Alcatraz. The sea floor reveals scars left by earthquakes, and may help predict when the next 'big one' will stri...[S]

Draining Alcatraz:.. may be available on playback
Draining Alcatraz:.. (Channel 5) Thursday 16 July 2020 23:30 - 00:30