Mahabharat - Season 1 Episode 55 Story of poisoned water and Yaksha

Jayadrath, Duryodhan’s brother-in-law, does penance for kidnapping Draupadi and is rewarded by Lord Shiva. In the forest, the Pandavas plan their 13th year of exile to live incognito and to work in another Kingdom. Nakul tries to fetch water form the lake but is told not to use the water by an invisible voice. He ignores the warning, drinks the water and falls down dead. His brothers meet the same fate except for Yudhishtir who realizes the voice belongs to Yaksha. The Yaksha asks him questions and Yudhishtir answers them correctly. The Yaksha reveals himself as Lord Yama and grants back the lives of all the dead brothers.