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

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

Mayim Bialik reveals how she grapples feeling 'useless, irrelevant and worthless'

Ken Jennings to return to host 'Jeopardy!' on July 3, after weeks of viewer complaints about Mayim Bialik-hosted shows