For the week starting Friday, March 20. Times are E.S.T., subject to change.
Bomb Target . . . U.S.A. (Fri. 9 p.m., CBS). A documentary on U.S. preparations for handling atomic disaster. Narrator: Arthur Godfrey.
Metropolitan Opera (Sat. 2 p.m., ABC). Tristan and Isolde, with Traubel, Svanholm.
Invitation to Learning (Sun. 11:35 a.m., CBS). Discussion of John Stuart Mill's essay On Liberty.
New York Philharmonic (Sun. 2:30 p.m., CBS). Conductor: Guido Cantelli.
Seminar (Sun. 1 p.m., ABC). Discussion of William James's Pragmatism.
Dragnet (Sun. 9:30 p.m., NBC). Police stories, with Jack Webb.
All-Star Revue (Sat. 8 p.m., NBC). Guests: Sonja Henie, Harpo Marx.
You Are There (Sun. 6 p.m.,...