She made her television debut in March 1958, at age seven, in role of Mimi in the NBC production of 'Mrs.
McThing, playing opposite Helen Hayes.
[1] Wager's second television appearance was as Flora in NBC's October 1959 production of The Turn of the Screw, playing opposite Ingrid Bergman.
[2] She was nominated at the 1959 Sylvania Television Awards for outstanding performance by an actress in a supporting role,[3] ultimately losing to Colleen Dewhurst.
[4][5] In March 1960, at age nine, she narrated Prokofiev's "Peter and the Wolf" with Leonard Bernstein conducting in a CBS broadcast of the New York Philharmonic's Young People's Concerts.