It is the semi-final and just four MUAs remain. This week's assignment requires serious flair as the MUAs are booked on a beauty editorial for world-renowned photographer and director and this week's guest judge Rankin.Rankin's magazine Hunger is known for pushing the boundaries of fashion, style and make-up, and he wants the MUAs to think about experimental beauty, express themselves and most importantly inspire him for today's beauty editorial, which has a theme of the future. The shoot takes place in a tank of water, so each MUA must plan and produce a unique make-up look which fits the theme and works well with the water. Rankin is not only judging their make-up but also how they work with him to create the perfect image. The stakes are high - if Rankin is happy with an MUA's final look, the shots will feature in his magazine. Will the semi-finalists be able to keep their cool and make a splash under the watchful eye of one of the world's best-known photographers?The next day in Glow Up HQ, the MUAs face a surprise creative brief for the first time in the competition and are asked to design and create a look based on one of the four classical elements - earth, wind, air and fire. In a bid to make it into the final, the MUAs pull out all the stops, with looks featuring a silicone mouldable plastic, oriental, tattoo-style drawings using intricate line work and a 3D-layered look using hair.Once the creative briefs have been judged, Val and Dominic must decide which two MUAs enter the elimination face off. The MUAS are asked to pull off a rainbow eye with seamlessly-blended colours. Only three MUAs can make it to the Glow Up final.