Complex sentence: The commercially successful submarine war film "Destination Tokyo" (1943) was shot in just six weeks in the September and October, which left him exhausted; the reviewer from "Newsweek" thought it was one of the finest performances of his career.
Split into simpler sentences: The commercially successful submarine war film "Destination Tokyo" (1943) was shot in just six weeks in the September and October, exhausting him. The reviewer from "Newsweek" thought it was one of the finest performances of his career.