1x21 - Show #21

July 21, 1980

1x22 - Show #22

July 22, 1980

1x23 - Show #23

July 23, 1980

1x24 - Show #24

July 24, 1980

1x25 - Show #25

July 25, 1980

1x26 - Show #26

July 28, 1980

1x27 - Show #27

July 29, 1980

1x28 - Show #28

July 30, 1980

1x29 - Show #29

July 31, 1980

1x30 - Show #30

August 1, 1980

1x31 - Show #31

August 4, 1980

1x32 - Show #32

August 5, 1980

1x33 - Show #33

August 6, 1980

1x34 - Show #34

August 7, 1980

1x35 - Show #35

August 8, 1980

1x36 - Show #36

August 11, 1980

1x37 - Show #37

August 12, 1980

1x38 - Show #38

August 13, 1980

1x39 - Show #39

August 14, 1980

1x40 - Show #40

August 15, 1980

1x41 - Show #41

August 18, 1980

1x42 - Show #42

August 19, 1980

1x43 - Show #43

August 20, 1980

1x44 - Show #44

August 21, 1980

1x45 - Show #45

August 22, 1980

1x46 - Show #46

August 25, 1980

1x47 - Show #47

August 26, 1980

1x48 - Show #48

August 27, 1980

1x49 - Show #49

August 28, 1980

1x50 - Show #50

August 29, 1980

1x51 - Show #51

September 1, 1980

1x52 - Show #52

September 2, 1980

1x53 - Show #53

September 3, 1980

1x54 - Show #54

September 4, 1980

1x55 - Show #55

September 5, 1980

1x56 - Show #56

September 8, 1980

1x57 - Show #57

September 9, 1980

1x58 - Show #58

September 10, 1980

1x59 - Show #59

September 11, 1980

1x60 - Show #60

September 12, 1980

1x61 - Show #61

September 15, 1980

1x62 - Show #62

September 16, 1980

1x63 - Show #63

September 17, 1980

1x64 - Show #64

September 18, 1980

1x65 - Show #65

September 19, 1980

1x66 - Show #66

September 22, 1980

1x67 - Show #67

September 23, 1980

1x68 - Show #68

September 24, 1980

1x69 - Show #69

September 25, 1980

1x70 - Show #70

September 26, 1980

1x72 - Show #72

September 30, 1980

1x73 - Show #73

October 1, 1980

1x74 - Show #74

October 2, 1980

1x75 - Show #75

October 3, 1980

1x76 - Show #76

October 6, 1980

1x77 - Show #77

October 7, 1980

1x78 - Show #78

October 8, 1980

1x79 - Show #79

October 9, 1980

1x80 - Show #80

October 10, 1980

1x81 - Show #81

October 13, 1980

1x82 - Show #82

October 14, 1980

1x83 - Show #83

October 15, 1980

1x84 - Show #84

October 16, 1980

1x85 - Show #85

October 17, 1980

1x86 - Show #86

October 20, 1980

1x87 - Show #87

October 21, 1980

1x88 - Show #88

October 22, 1980

1x89 - Show #89

October 23, 1980

Second to last show, with Steve Allen; kids' Halloween costumes.

1x90 - Show #90

October 24, 1980

Dave jokes that the world is coming to an end; interviews with news anchor Edwin Newman and bandleader Frank Owen; Merrill Markoe, Rich Hall, Gerard Mulligan and Paul Raley tell jokes that didn't make it on the air during the summer; Wil Shriner shows bloopers from the show's run; Dave introduces crew members, including Kathleen Ankers, Bob Pook and Bill Wendell; Harve Mann sings ""The David Letterman Show"" theme; a deck of ""living"" playing cards dances through the studio as confetti and balloons are dropped.