Oh dear.....it must be just me then!!! It's preceded by The Magic Tricks Of JJ Abrams!
If it's 'over the air' tonight it should be posted to iPlayer soon.
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Here's a bit more science. Rather than opening a new thread, I thought I'd chuck it here, since most SF aficionados are into real science too.
The speed of light is 38 mph. This is fact! Discussion is open.
Damn. That didn't last long. Not ice, but your thinking is sound. Light is slowed by substance. The substance that slows it to 38 mpg is supercooled sodium.