Yes of course it's real snow, don't be silly

Episode 1x03: "Operation: Deep Freeze"

There are boffins in Antarctica, and verily they are boffinly. Intrigued by strange readings, they send a team of other boffins out to investigate, but the team does not return. Neither does the team sent out to find them, or the team sent out to find that team. It may be time to stop sending teams; that really isn't a good success rate. However, further boffins have determined that the strange readings that sparked off all these disappearances can only have been caused by a nuclear explosion. There's trouble afoot. It must be time to send in some Champions.

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