Ken Jennings to replace Mayim Bialik as Celebrity Jeopardy host

Ken Jennings Takes Over Hosting Duties From Mayim Bialik For 'Celebrity Jeopardy!' Season 2

Ken Jennings To Host ‘Celebrity Jeopardy!’ As ABC Sets Premiere Dates For Gameshows, ‘Shark Tank’ & ‘AFV’

Mayim Bialik, 47, documents first routine colonoscopy with her fans as star declares 'ignoring things doesn't make them go away!'