On this day in 1957, a comic named Jack Paar took over the NBC late-night program formerly known as Tonight (and presently known as The Tonight Show starring Jimmy Fallon). Tonight launched in 1954 as a live, late-night variety/talk show with Steve Allen as host. When Allen landed his own weekly prime-time series in 1956, he cut back his Tonight hosting duties to three nights a week (with Ernie Kovacs stepping in as the show's host each Monday and Tuesday). In 1957, when Allen left the show al