Season 0 of Rowan & Martin's Laugh-In premiered on Sep 09, 1967
Season 1 of Rowan & Martin's Laugh-In premiered on Jan 22, 1968
Season 2 of Rowan & Martin's Laugh-In premiered on Sep 16, 1968
Season 3 of Rowan & Martin's Laugh-In premiered on Sep 15, 1969
Season 4 of Rowan & Martin's Laugh-In premiered on Sep 14, 1970
Season 5 of Rowan & Martin's Laugh-In premiered on Sep 13, 1971
Season 6 of Rowan & Martin's Laugh-In premiered on Sep 11, 1972