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:
| Series # | Season # | Title | Directed by | Original air date | Production code |
| --- | --- | --- | --- | --- | --- |
| 77.0 | 1.0 | "Change, Change, Change" | Don Kurt | January 8, 1998 | K2701 |
| 78.0 | 2.0 | "Drop Dead Gorgeous" | Norberto Barba | January 15, 1998 | K2704 |
| 79.0 | 3.0 | "Pipeline" | Norberto Barba | January 22, 1998 | K2705 |
| 80.0 | 4.0 | "Spare Parts" | Frederick K. Keller | January 29, 1998 | K2702 |
| 81.0 | 5.0 | "Mob Street" | Don Kurt | February 12, 1998 | K2706 |
| 82.0 | 6.0 | "Rat Trap" | Timothy Van Patten | March 12, 1998 | K2708 |
| 83.0 | 7.0 | "Quid Pro Quo" | Martha Mitchell | March 19, 1998 | K2709 |
| 84.0 | 8.0 | "Capital Punishment" | Melanie Mayron | March 26, 1998 | K2707 |
| 85.0 | 9.0 | "The Unusual Suspects" | Allen Coulter | May 28, 1998 | K2703 |
| 86.0 | 10.0 | "Sign o' the Times" | Timothy Van Patten | June 4, 1998 | K2710 |
| 87.0 | 11.0 | "Going Native" | Peter R. McIntosh | June 11, 1998 | K2711 |
| 88.0 | 12.0 | "The Troubles" | Robert Wiemer | June 25, 1998 | K2712 |
| 89.0 | 13.0 | "Catharsis" | Don Kurt | 1999 | K2713 |
Question:
What is the season for series 81?
Answer:
5.0