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 | Production code | U.S. viewers (million) |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | " Pilot " | Marcos Siega | Teleplay by: Kevin Williamson & Julie Plec | September10,2009 | 296766 | 4.91 |
| 2.0 | " The Night of the Comet " | Marcos Siega | Kevin Williamson & Julie Plec | September17,2009 | 2J5001 | 3.78 |
| 3.0 | " Friday Night Bites " | John Dahl | Barbie Kligman & Bryan M. Holdman | September24,2009 | 2J5002 | 3.81 |
| 4.0 | "Family Ties" | Guy Ferland | Andrew Kreisberg & Brian Young | October1,2009 | 2J5003 | 3.53 |
| 5.0 | " You're Undead to Me " | Kevin Bray | Sean Reycraft & Gabrielle Stanton | October8,2009 | 2J5004 | 3.52 |
| 6.0 | "Lost Girls" | Marcos Siega | Kevin Williamson & Julie Plec | October15,2009 | 2J5005 | 3.88 |
| 8.0 | "162 Candles" | Rick Bota | Barbie Kligman & Gabrielle Stanton | November5,2009 | 2J5007 | 4.09 |
| 9.0 | "History Repeating" | Marcos Siega | Bryan M. Holdman & Brian Young | November12,2009 | 2J5008 | 4.10 |
| 10.0 | "The Turning Point" | J. Miller Tobin | Kevin Williamson & Julie Plec & Barbie Kligman | November19,2009 | 2J5009 | 3.57 |
| 12.0 | "Unpleasantville" | Liz Friedlander | Barbie Kligman & Brian Young | January28,2010 | 2J5011 | 3.71 |
| 13.0 | "Children of the Damned" | Marcos Siega | Kevin Williamson & Julie Plec | February4,2010 | 2J5012 | 3.99 |
| 14.0 | "Fool Me Once" | Marcos Siega | Brett Conrad | February11,2010 | 2J5013 | 3.51 |
| 15.0 | "A Few Good Men" | Joshua Butler | Brian Young | March25,2010 | 2J5014 | 3.33 |
| 16.0 | "There Goes the Neighborhood" | Kevin Bray | Bryan Oh & Andrew Chambliss | April1,2010 | 2J5015 | 2.80 |
| 17.0 | "Let the Right One In" | Dennis Smith | Story by: Brian Young Teleplay by: Julie Plec | April8,2010 | 2J5016 | 3.48 |
| 18.0 | "Under Control" | David Von Ancken | Barbie Kligman & Andrew Chambliss | April15,2010 | 2J5017 | 3.15 |
| 19.0 | "Miss Mystic Falls" | Marcos Siega | Bryan Oh & Caroline Dries | April22,2010 | 2J5018 | 3.33 |
| 20.0 | "Blood Brothers" | Liz Friedlander | Kevin Williamson & Julie Plec | April29,2010 | 2J5019 | 3.39 |
| 21.0 | "Isobel" | J. Miller Tobin | Caroline Dries & Brian Young | May6,2010 | 2J5020 | 3.31 |
Question:
What is the production code of the episode that was watched by 3.81 million U.S. viewers? 
Answer:
2J5002