TV star Sarah Greene has lifted the lid on a major shake-up for the third series of hit game show The Finish Line – and it’s set to test contestants like never before. The presenter, who hosts the high-stakes BBC quiz alongside Roman Kemp, teased big changes ahead, while Roman warned that the revamped format will leave plenty of hopefuls stumbling at the final hurdle. The second series of The Finish Line upped the ante with an extended track, delivering even more edge-of-your-seat showdowns. Now, Sarah has teased an even bigger twist for series three – the supercharged end zone, set to push contestants to their limits! Sarah told the Mirror: “You haven’t seen anything until you’ve seen our supercharged end zone. “It almost sets the studio alight as people are getting towards the finish line. Roman also gets through more questions on this series than the last two put together!” The 66-year-old teased that the show will have its underdogs as she revealed: "It’s very compelling for viewers to see someone who comes in a little more unsure of themselves. “They might confess to being nervous, but then they shine because the questions have gone in their direction. That’s purely random.” Meanwhile, Roman confessed that he likes to see contestants push themselves and make mistakes. The 32-year-old said: “You’re going to see a lot of people fail this season. And there’s a sick part of me that quite enjoys seeing people set on victory and not make it.” He also shared that he was particularly moved by one contestant’s story. Roman unveiled: “He came on wanting to win money for his dad. He didn’t think his dad would be around for much longer, and he wanted to take him to see a Six Nations rugby match and travel, do things only money can buy. “I won’t give it away if he did it or not, but you can’t help but root for someone like that.” Sarah admitted that Roman is his "TV son" and “I’m there purely to look after him, and he looks after me too. He’s the only one I want.” However, she added that it is often hard to keep a straight face and stop each other from laughing, saying: “Roman has a much better poker face than I do. "You can read my face from a mile off. But I have to remind myself I’m pretending to be Richard Osman on Pointless. That’s the acting skill coming in.”