Season Episodes Originally aired Rank Rating First aired Last aired 1 26 September 22, 1986 (1986-09-22) May 11, 1987 (1987-05-11) #28 16.5[note 1] 2 26 September 21, 1987 (1987-09-21) May 9, 1988 (1988-05-09) #10 18.8[note 2] 3 26 October 3, 1988 (1988-10-03) May 8, 1989 (1989-05-08) #15 17.5[note 3] 4 24 September 18, 1989 (1989-09-18) March 24, 1990 (1990-03-24) #39 13.7[note 4] ↑ Tied with Hunter ↑ Tied with The Wonder Years ↑ Tied with Monday Night Football ↑ Tied with Family Matters and Jake and the Fatman[7]