TELEVISION Thursday, July 18
The Twilight Zone (CBS, 9-10 p.m.).* Mystery of an American astronaut who loses contact with ground control for six hours while in orbit and finds things strangely unfamiliar when he returns. Repeat.
Saturday, July 20
P.G.A. Championship Golf Tournament (CBS, 5-6 p.m.). From DAC Country Club, Dallas.
Miss Universe Beauty Pageant (CBS, 10-11:30 p.m.). John Daly, Arlene Francis and Gene Rayburn act as hosts as Miss Universe 1963 is chosen in Miami Beach.
Sunday, July 21
P.G.A. Golf Tournament (CBS, 4:30-6 p.m.). Final rounds.
The Twentieth Century (CBS,...