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 | U.S. viewers (millions) |
| --- | --- | --- | --- | --- | --- |
| 1.0 | " Pilot " | Andy Ackerman | Kari Lizer | March13,2006 | 12.36 |
| 2.0 | "Supertramp" | Andy Ackerman | Teleplay: Jeff Astrof Story: Kari Lizer | March13,2006 | 15.09 |
| 3.0 | "Open Water" | Andy Ackerman | Adam Barr | March20,2006 | 15.13 |
| 4.0 | "One Toe Over the Line, Sweet Jesus" | Andy Ackerman | Adam Barr | March27,2006 | 11.96 |
| 5.0 | "I'll Show You Mine" | Andy Ackerman | Steve Baldikoski & Bryan Behar | April3,2006 | 8.28 |
| 6.0 | "The Other F Word" | Andy Ackerman | Jeff Astrof | April10,2006 | 11.42 |
| 7.0 | "Long Days Journey Into Stan" | Andy Ackerman | Danielle Evenson | April17,2006 | 11.38 |
| 8.0 | "Teach Your Children Well" | Andy Ackerman | Katie Palmer | April24,2006 | 11.81 |
| 9.0 | "Ritchie Has Two Mommies" | Andy Ackerman | Kari Lizer | May1,2006 | 11.92 |
| 10.0 | "No Fault Divorce" | Andy Ackerman | Jeff Astrof & Adam Barr and Kari Lizer | May8,2006 | 11.87 |
Question:
What episode number of the series is "open water"?
Answer:
3.0