What to Expect from Tonight's Project Runway All Stars Episode

'I've been in London for, like, 20 minutes, and there's a freaking royal.'

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London called, and the designers answered. This week, #PRASpacks up and relocates across the pond, where the giddy designers stand in a Tube station and run into Sarah Ferguson.

Their challenge is to create a look inspired by the city, which results in some cozy-looking outerwear and scarves. Isaac isn't so happy, however, and says he's offended by what must have been an egregious error. Or some bad 'tude.

To find out who lives to fight another day, watch Project Runway All Stars at 9 p.m. EST on Lifetime.

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