Born in Yekaterinoslav, Ukrainian SSR (now known as Dnipro, Ukraine) to a Jewish family, Sagal immigrated to the United States, where he attended the Yale School of Drama. Sagal's TV credits include directing episodes of The Twilight Zone, T.H.E. Cat, Alfred Hitchcock Presents, Night Gallery, Columbo: Candidate for Crime, Peter Gunn, and The Man from U.N.C.L.E.. He also directed the 1972 television adaptation of Percy MacKaye's play The Scarecrow, for PBS. He was nominated for four Primetime Emmy Awards for his direction of the miniseries Rich Man, Poor Man and, posthumously, Masada.