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:
| Episode # | # in Season | Episode Name | Airdate | Location |
| --- | --- | --- | --- | --- |
| 78.0 | 1.0 | The Origin of Donnie (Part 1) | August 18, 2001 | Borneo , Indonesia |
| 79.0 | 2.0 | The Origin of Donnie (Part 2) | August 18, 2001 | Borneo , Indonesia |
| 80.0 | 3.0 | The Origin of Donnie (Part 3) | August 18, 2001 | Borneo , Indonesia |
| 81.0 | 4.0 | The Origin of Donnie (Part 4) | August 18, 2001 | Borneo , Indonesia |
| 82.0 | 5.0 | The Trouble With Darwin | October 31, 2001 | Tanzania |
| 83.0 | 6.0 | Hot Air | June 1, 2002 | Rotorua , New Zealand |
Question:
What is the lowest episode # with an air date of October 31, 2001?
Answer:
82.0