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:
| No. in series | Title | Directed by | Written by | Original air date | Production code |
| --- | --- | --- | --- | --- | --- |
| 1.0 | " Pilot " "Theo's Economic Lesson" | Jay Sandrich | Ed. Weinberger and Michael Leeson | September 20, 1984 | 101.0 |
| 2.0 | " Goodbye Mr. Fish " | Jay Sandrich | Earl Pomerantz | September 27, 1984 | 102.0 |
| 3.0 | "Bad Dreams" | Jay Sandrich | John Markus | October 4, 1984 | 103.0 |
| 4.0 | "Is That My Boy?" | Jay Sandrich | John Markus | October 11, 1984 | 105.0 |
| 5.0 | "A Shirt Story" | Jay Sandrich | John Markus | October 18, 1984 | 108.0 |
| 6.0 | "Breaking With Tradition" | Jay Sandrich | Earl Pomerantz | October 25, 1984 | 106.0 |
| 7.0 | "One More Time" | Jay Sandrich | Earl Pomerantz | November 1, 1984 | 107.0 |
| 8.0 | "Play It Again, Vanessa" | Jay Sandrich | Jerry Ross | November 8, 1984 | 109.0 |
| 9.0 | "How Ugly Is He?" | Jay Sandrich | John Markus | November 15, 1984 | 110.0 |
| 10.0 | "Bonjour, Sondra" | Jay Sandrich | Jerry Ross & Michael Loman | November 22, 1984 | 111.0 |
| 11.0 | "Knight to Night" "You're Not a Mother Night" | Jay Sandrich | Karyl Geld Miller & Korby Siamis | December 6, 1984 | 104.0 |
| 12.0 | "Rudy's Sick" | Jay Sandrich | Matt Williams | December 13, 1984 | 113.0 |
| 13.0 | "Father's Day" | Jay Sandrich | John Markus & Elliot Shoenman | December 20, 1984 | 112.0 |
| 14.0 | "Independence Day" | Jay Sandrich | Matt Robinson | January 10, 1985 | 114.0 |
| 15.0 | "Physician of the Year" | Jay Sandrich | John Markus | January 17, 1985 | 115.0 |
| 16.0 | "Jitterbug Break" | Jay Sandrich | Matt Williams | January 31, 1985 | 116.0 |
| 17.0 | "Theo and the Joint" | Jay Sandrich | John Markus | February 7, 1985 | 117.0 |
| 18.0 | "Vanessa's New Class" | Jay Sandrich | Matt Williams & Carmen Finestra | February 14, 1985 | 118.0 |
| 19.0 | "Clair's Case" | Jay Sandrich | Winifred Hervey | February 21, 1985 | 119.0 |
| 20.0 | "Back to the Track, Jack" | Jay Sandrich | Matt Robinson | February 28, 1985 | 120.0 |
| 21.0 | "The Younger Woman" | Jay Sandrich | John Markus | March 14, 1985 | 121.0 |
| 22.0 | "The Slumber Party" | Jay Sandrich | Carmen Finestra | March 28, 1985 | 122.0 |
| 23.0 | "Mr. Quiet" | Jay Sandrich | Emily Tracy | May 2, 1985 | 125.0 |
Question:
How many different production codes does the episode originally aired on October 18, 1984 have?
Answer:
1.0