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Tomorrow will see the start of the longest strike in NHS history. Junior doctors in England will go on strike for six days - amounting to a continuous walkout of 144 hours. Since the industrial action started, more than a million appointments and treatments have been cancelled. NHS leaders have said this strike will put patients at 'serious risk' . Newsnight looks at what the impact could be. And the new year brings further violence in Ukraine as Russian attacks intensify, with a major escalation in missile strikes. Today, at least five people have been killed and more than 130 have been injured. In recent days, there have been major aerial assaults by both sides. And on New Year's Eve, Russia launched the largest drone attack of the war so far. With Sima Kotecha.