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You can now watch the entire Rough Science Season 4 Episode 2 movie online in high-definition quality, complete with English subtitles for a better viewing experience. Best of all, there’s no need to download anything—simply stream it directly from your device anytime, anywhere.

Rough Science: No space mission can succeed without communication, so Week two's set of Rough Science space challenges are all based around making contact. Jonathan and Kathy have to come up with a way of communicating that doesn't use sound waves - because in the vacuum of space, there's nothing for them to move through. It took two years and a million pounds to develop a pen for use in space - one that would work in zero gravity. Ellen and Mike have no money and just three days to come up with their own version. Iain's challenge is very different. He has to find a way to communicate with aliens! NASA faced this problem when they sent the Pioneer probe out into deep space. Their solution was a plaque with crucial information about the creatures (us) who had sent the craft out into space. So Iain has to come up with a plaque that would communicate information about the Rough Science team to aliens.