The series aired its last weekly episode on Fox on Saturday. Fox has cited high production costs for pulling the plug on the series, which premiered in 1988.
But Walsh vows he'll return to television.
He said earlier this week he has heard from other networks, including Fox News Channel. A decision on a new TV home could be announced within two weeks, he said.
Walsh, 65, launched his crime-busting crusade in the aftermath of the abduction and murder of his 6-year-old son Adam in 1981.