Before he was introduced, it was noted that Trebek's widow and children had been on hand for the stage's dedication to its old host, who died of cancer last October.
“For the first time on the Alex Trebek stage, let's play 'Jeopardy!,” Richards said.
In keeping with Trebek's tradition — he considered the game and its players the star — Richards generally took a backseat to the action.
The show is in the midst of an historic run by Matt Amodio, a Ph.D student from New Haven, Connecticut. He won his 19th straight game on Monday, increasing his total winnings to $642,601, behind only Ken Jennings and James Holzhauer.
Amodio made quick work of competitors Amde Mengistu of Brooklyn, N.Y., and Gabbie Kim, of Pittsburgh, Pennsylvania, winning $67,800 on Monday.
“Jeopardy!” next week will bring actress Mayim Bialik back as guest host before beginning another series of tryouts for Trebek's permanent replacement.
The Richards era will end after five shows. Trebek, who began in 1984, totaled more than 8,200.