1. Spring

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. 7 January 2013. 60 min

Wildlife cameraman Gordon Buchanan travel to far flung Svalbard to find a polar bear birth den and meet mother Lyra and her cubs Miki and Luca as they emerge from their den.

2. Summer

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. 8 January 2013. 60 min

Gordon Buchanan and the team return to Svalbard in mid-June to try to understand how his polar bear family are surviving the unusual arctic weather. He discovers that cub Luca is missing.

3. Autumn

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. 10 January 2013. 60 min

Gordon and the team return to Svalbard in September. They don't know if either bear is still alive. Lyra's collar hasn't sent a signal for a month - finding her this time will be a huge challenge.