Legendary TV host Alex Trebek  of “Jeopardy!” fame is a great dad.

So great, in fact, that he just spent $1.92 million on a quaint Harlem townhouse for his 25-year-old son, Matthew.

Part of the Strivers’ Row Historic District, the property is at 310 West 140th St.

The younger Trebek, a Fordham University graduate and former bartender, plans on opening a restaurant in Harlem, as we reported earlier this week.

He will likely live in the two-bedroom, three-bathroom garden duplex.

Listing broker David Daniels of Corcoran declined to comment.