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 | No. in season | Title | Directed by | Written by | Original air date | U.S. viewers (million) |
| --- | --- | --- | --- | --- | --- | --- |
| 24.0 | 1.0 | "Taking Control" | Félix Alcalá | Robert King & Michelle King | September28,2010 | 12.84 |
| 25.0 | 2.0 | "Double Jeopardy" | Dean Parisot | Ted Humphrey | October5,2010 | 12.76 |
| 26.0 | 3.0 | "Breaking Fast" | James Whitmore, Jr. | Corinne Brinkerhoff | October12,2010 | 11.82 |
| 27.0 | 4.0 | "Cleaning House" | Rosemary Rodriguez | Robert King & Michelle King | October19,2010 | 12.17 |
| 28.0 | 5.0 | "VIP Treatment" | Michael Zinberg | Robert King & Michelle King | October26,2010 | 12.59 |
| 29.0 | 6.0 | "Poisoned Pill" | Peter O'Fallon | Keith Eisner | November9,2010 | 12.33 |
| 30.0 | 7.0 | "Bad Girls" | Jim McKay | Courtney Kemp Agboh | November16,2010 | 11.74 |
| 31.0 | 8.0 | "On Tap" | Roxann Dawson | Leonard Dick | November23,2010 | 10.03 |
| 32.0 | 9.0 | "Nine Hours" | Julie Hébert | Meredith Averill | December14,2010 | 11.84 |
| 33.0 | 10.0 | "Breaking Up" | Félix Alcalá | Robert King & Michelle King | January11,2011 | 12.29 |
| 34.0 | 11.0 | "Two Courts" | Tom DiCillo | Ted Humphrey | January18,2011 | 11.43 |
| 35.0 | 12.0 | "Silly Season" | Rosemary Rodriguez | Corinne Brinkerhoff | February1,2011 | 12.14 |
| 40.0 | 17.0 | "Ham Sandwich" | Griffin Dunne | Keith Eisner | March22,2011 | 11.70 |
| 41.0 | 18.0 | "Killer Song" | James Whitmore, Jr. | Karen Hall | March29,2011 | 10.16 |
| 42.0 | 19.0 | "Wrongful Termination" | Phil Abraham | Ted Humphrey | April5,2011 | 10.82 |
Question:
Who wrote the episodes that were directed by Peter O'Fallon?
Answer:
Keith Eisner