University Challenge viewers were stunned by one answer during the quiz. Amol Rajan returned as the host for the popular BBC quiz show as she welcomed a new team of students. This year's cohort will go head to head in a bid to gain the title from Imperial College London, who won the title for the fifth time last year. Monday's episode saw UCL go up against Cambridge's Darwin College. Competing for UCL were Calum Jack, Josh Mandel, Olivia Holtermann Entwistle and Sanjay Prabhakar. Meanwhile,