when was ken jennings on jeopardy

Ken Jennings first appeared on Jeopardy! as a contestant on June 2, 2004. During this initial run, he set a record with a 74-game winning streak and earned $2,522,700 over about six months of episodes. Afterward, he returned to the show as a consulting producer in 2020 and then guest-hosted from January 11 to February 19, 2021. Since 2023, he has been the sole permanent host of Jeopardy! following the departure of Mayim Bialik, with his hosting career ongoing through at least 2025.