Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Season | Episodes | First airdate | Last airdate | Nielsen ranking |
| --- | --- | --- | --- | --- |
| Season 1 | 6.0 | March 25, 1986 | April 29, 1986 | #13 |
| Season 2 | 22.0 | September 17, 1986 | May 6, 1987 | #31 |
| Season 3 | 22.0 | September 23, 1987 | May 6, 1988 | #48 |
| Season 4 | 22.0 | October 14, 1988 | May 5, 1989 | #38 |
| Season 5 | 24.0 | September 22, 1989 | May 4, 1990 | #34 |
| Season 6 | 24.0 | September 28, 1990 | May 3, 1991 | #32 |
| Season 7 | 24.0 | September 20, 1991 | April 18, 1992 | #61 |
| Season 8 | 6.0 | July 9, 1993 | August 6, 1993 | #19 |
Question:
How many episodes were in the season that first aired on September 22, 1989?
Answer:
24.0