<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (May 2010) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (May 2010) (Learn how and when to remove this template message) </Td> </Tr> <Table> <Tr> <Th_colspan="2"> What's Happening!! </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Created by </Th> <Td> Eric Monte </Td> </Tr> <Tr> <Th> Based on </Th> <Td> Cooley High </Td> </Tr> <Tr> <Th> Starring </Th> <Td> Ernest Lee Thomas Haywood Nelson Fred Berry Danielle Spencer Mabel King (Season 1 - 2) Shirley Hemphill </Td> </Tr> <Tr> <Th> Opening theme </Th> <Td> "What's Happening!!" </Td> </Tr> <Tr> <Th> Composer (s) </Th> <Td> Henry Mancini </Td> </Tr> <Tr> <Th> Country of origin </Th> <Td> United States </Td> </Tr> <Tr> <Th> No. of seasons </Th> <Td> </Td> </Tr> <Tr> <Th> No. of episodes </Th> <Td> 65 (list of episodes) </Td> </Tr> <Tr> <Th_colspan="2"> Production </Th> </Tr> <Tr> <Th> Executive producer (s) </Th> <Td> Bernie Orenstein Saul Turteltaub Bud Yorkin </Td> </Tr> <Tr> <Th> Running time </Th> <Td> 22--25 minutes </Td> </Tr> <Tr> <Th> Production company (s) </Th> <Td> Bud Yorkin Productions (1976 - 1978) (seasons 1 - 2) TOY Productions (1976 - 1979) (seasons 1 - 3) </Td> </Tr> <Tr> <Th> Distributor </Th> <Td> Columbia Pictures Television (1980 - 1995) Columbia TriStar Television (1995 - 2002) Sony Pictures Television (2002 - present) </Td> </Tr> <Tr> <Th_colspan="2"> Release </Th> </Tr> <Tr> <Th> Original network </Th> <Td> ABC </Td> </Tr> <Tr> <Th> Original release </Th> <Td> August 5, 1976 (1976 - 08 - 05)--April 28, 1979 (1979 - 04 - 28) </Td> </Tr> <Tr> <Th_colspan="2"> Chronology </Th> </Tr> <Tr> <Th> Followed by </Th> <Td> What's Happening Now!! </Td> </Tr> </Table> <Tr> <Th_colspan="2"> What's Happening!! </Th> </Tr>

How long was what's happening on the air
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