Mayim Bialik and journalist Bill Whitaker will also fill in for the late Alex Trebek.
The game show's all-time champion temporarily stepped in for the late Alex Trebek.
The game show took a trip down memory lane with a video montage of some of the late host's endearing moments.
The late "Jeopardy!" host's final episode was set to run Friday.
"Nobody on Jeopardy had a clue," he said.
The quiz show host made an emotional request on the show shortly before his death.
The longtime host died of pancreatic cancer on Nov. 8 at age 80.
The beloved game show host reminded viewers that even amid a pandemic, there are things to be thankful for.
The longtime and beloved "Jeopardy!" host died earlier this month after a lengthy battle with the disease.
The "Deadpool" actor said the "Jeopardy!" host's death was "absolutely gut-wrenching."