Kaine Horman and Desiree Young were on the daytime talk show Thursday. They have done a series of interviews and appearances to keep their son's case in front of the public.
Investigators say Kyron Horman's stepmother, Terri Horman, was the last person known to have seen the second-grader at his school in Portland three months ago. Police have not named any suspects.
Kaine Horman has filed for divorce from Terri Horman.
Terri Horman's attorney, Stephen Houze, would not comment on the show.