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:
| DVD Name | Episodes | Region 1 | Region 2 | Region 4 |
| --- | --- | --- | --- | --- |
| Season One | 24.0 | N/A | April 26, 2010 | Sept, 2010 |
| Season Two | 18.0 | N/A | September 6, 2010 | N/A |
| Season Three | 18.0 | N/A | N/A | N/A |
| Season Four | 18.0 | N/A | N/A | N/A |
| Season Five | 18.0 | N/A | N/A | N/A |
Question:
What is the smallest number of episodes in a season?
Answer:
18.0