<P> In "The Note", the first episode of season three, the bumper music featured a scatting female jazz singer who sang a phrase that sounded like "easy to beat". Jerry Seinfeld and executive producer Larry David both liked Wolff's additions, and three episodes were produced with this new style music . However, they had neglected to inform NBC and Castle Rock executives of the change, and when the season premiere aired, the executives were surprised and unimpressed, and requested that they return to the original style . The subsequent two episodes were redone, leaving this episode as the only one with additional music elements . In the commentary of "The Note", Louis - Dreyfus facetiously suggests it was removed because the perceived lyric related closely to the low ratings at the time . </P> <P> In the final three seasons, the bits were tweaked slightly with more frantic rhythms; a bass guitar was added in addition to the sampled bass from earlier seasons . Throughout the show, the main theme could be re-styled in different ways depending on the episode . For instance, in "The Betrayal", part of which takes place in India, the theme is heard played on a sitar . </P> <Table> <Tr> <Th_colspan="2"> Season </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> <Th_colspan="3"> Nielsen ratings </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> <Th> Rank </Th> <Th> Rating </Th> <Th> Viewers (millions) </Th> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 5 </Td> <Td_colspan="1"> July 5, 1989 (1989 - 07 - 05) </Td> <Td> June 21, 1990 (1990 - 06 - 21) </Td> <Td> N / A </Td> <Td> N / A </Td> <Td> 19.26 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 12 </Td> <Td_colspan="1"> January 23, 1991 (1991 - 01 - 23) </Td> <Td> June 26, 1991 (1991 - 06 - 26) </Td> <Td> #46 </Td> <Td> 12.5 </Td> <Td> 18.07 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 23 </Td> <Td_colspan="1"> September 18, 1991 (1991 - 09 - 18) </Td> <Td> May 6, 1992 (1992 - 05 - 06) </Td> <Td> #42 </Td> <Td> 12.5 </Td> <Td> 17.66 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 24 </Td> <Td_colspan="1"> August 12, 1992 (1992 - 08 - 12) </Td> <Td> May 20, 1993 (1993 - 05 - 20) </Td> <Td> #25 </Td> <Td> 13.7 </Td> <Td> 20.91 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 5 </Td> <Td_colspan="2"> 22 </Td> <Td_colspan="1"> September 16, 1993 (1993 - 09 - 16) </Td> <Td> May 19, 1994 (1994 - 05 - 19) </Td> <Td> #3 </Td> <Td> 19.6 </Td> <Td> 29.59 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 6 </Td> <Td_colspan="2"> 24 </Td> <Td_colspan="1"> September 22, 1994 (1994 - 09 - 22) </Td> <Td> May 11, 1995 (1995 - 05 - 11) </Td> <Td> #1 </Td> <Td> 20.6 </Td> <Td> 30.06 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 7 </Td> <Td_colspan="2"> 24 </Td> <Td_colspan="1"> September 21, 1995 (1995 - 09 - 21) </Td> <Td> May 16, 1996 (1996 - 05 - 16) </Td> <Td> #2 </Td> <Td> 21.2 </Td> <Td> 33.19 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 8 </Td> <Td_colspan="2"> 22 </Td> <Td_colspan="1"> September 19, 1996 (1996 - 09 - 19) </Td> <Td> May 15, 1997 (1997 - 05 - 15) </Td> <Td> #2 </Td> <Td> 20.5 </Td> <Td> 32.48 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 9 </Td> <Td_colspan="2"> 24 </Td> <Td_colspan="1"> September 25, 1997 (1997 - 09 - 25) </Td> <Td> May 14, 1998 (1998 - 05 - 14) </Td> <Td> #1 </Td> <Td> 22.0 </Td> <Td> 38.03 (32.15) </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Season </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> <Th_colspan="3"> Nielsen ratings </Th> </Tr>

When did the first episode of seinfeld air