Khatron Ke Khiladi 13 introduces new twist with challengers. Divyanka Tripathi returns as a challenger and impresses contestants with her stunts. Aishwarya Sharma mimics Divyanka, leaving host Rohit Shetty in splits. Divyanka gives Aishwarya a dare to sing a song with a crocodile in her arms. Divyanka also challenges Shiv Thakare, who struggles and falls into the sea during the stunt.