Did You Know?
The first two seasons were hosted by Sander Vanocur
. In January 1971, Garrick Utley
replaced Vanocur as host. In October 1971, the show moved to Fridays and was retitled "Chronolog". The show returned to Tuesdays for its final 1972-73 run, reclaimed its original title, but was cut from two hours to an hour with no regular host. See more