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 | Written by | Original air date | Production code | U.S. viewers (million) |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 37.0 | 1.0 | "Yankee Dan" | Emile Levisetti | Dailyn Rodriguez | May27,2013 | BDF401 | 3.26 |
| 38.0 | 2.0 | "Shot Girls" | Jonathan Frakes | John J. Sakmar & Kerry Lenhart | June3,2013 | BDF402 | 2.74 |
| 39.0 | 3.0 | "Killer Barbecue" | Paul Edwards | Tom Garrigus | June10,2013 | BDF403 | 2.31 |
| 40.0 | 4.0 | "Magic Longworth" | Donna Deitch | Matthew J. Lieberman | June17,2013 | BDF404 | 2.31 |
| 41.0 | 5.0 | "Apocalypse Now" | Marc Roskin | Elle Johnson | June24,2013 | BDF405 | 2.56 |
| 42.0 | 6.0 | "Glade-iators!" | Martha Coolidge | John J. Sakmar & Kerry Lenhart | July1,2013 | BDF406 | 2.55 |
| 43.0 | 7.0 | "Gypsies, Tramps and Thieves" | Ron Underwood | Tom Garrigus | July8,2013 | BDF407 | 2.51 |
| 44.0 | 8.0 | "Three's Company" | Eric Laneuville | Matthew J. Liberman | July15,2013 | BDF408 | 2.40 |
| 45.0 | 9.0 | "Fast Ball" | Ron Underwood | Elle Johnson | July29,2013 | BDF409 | 2.38 |
| 46.0 | 10.0 | "Gallerinas" | Eric Laneuville | Dailyn Rodriguez | August5,2013 | BDF410 | 2.32 |
| 47.0 | 11.0 | "Civil War" | Kelly Makin | John J. Sakmar & Kerry Lenhart | August12,2013 | BDF411 | 2.31 |
| 48.0 | 12.0 | "Happy Trails" | Gary A. Randall | Shaz Bennett | August19,2013 | BDF412 | 2.69 |
Question:
What episode number of the season was written by Tom Garrigus and had 2.31 million u.s. viewers?
Answer:
3.0