Roll up, roll up! RuPaul's search for the UK's Next Drag Race Superstar is nearly over as we reach the semi-final, and this week the queens' comedy chops are tested with a circus-themed comedy roast challenge. The semi-finalist queens step into the Drag Race Big Top to secure a place in next week's finale.It's a nerve-wracking time for the remaining queens, who have come so far, and, thankfully, two of the Drag Race UK sisterhood, and former roast challenge winners, Ella Vaday and Michael Marouli, are on hand to help. Meanwhile, Bafta-winning star of Derry Girls Siobhan McSweeney joins RuPaul as his extra-special guest judge alongside Michelle Visage and Alan Carr, as yet another queen sashays away.