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 |
| --- | --- | --- | --- | --- | --- |
| 268.0 | 1.0 | " Bloodline " | Stephen Cragg | Joe Sachs and David Zabel | September21,2006 |
| 269.0 | 2.0 | "Graduation Day" | Joanna Kerns | Janine Sherman Barrois and Lisa Zwerling | September28,2006 |
| 270.0 | 3.0 | "Somebody to Love" | Stephen Cragg | David Zabel | October5,2006 |
| 271.0 | 4.0 | "Parenthood" | Tawnia McKiernan | R. Scott Gemmill | October12,2006 |
| 272.0 | 5.0 | "Ames v. Kovac" | Richard Thorpe | Joe Sachs | October19,2006 |
| 273.0 | 6.0 | "Heart of the Matter" | Andrew Bernstein | Janine Sherman Barrois | November2,2006 |
| 274.0 | 7.0 | "Jigsaw" | John Wells | Virgil Williams | November9,2006 |
| 275.0 | 8.0 | "Reason to Believe" | Ernest Dickerson | R. Scott Gemmill and David Zabel | November16,2006 |
| 276.0 | 9.0 | "Scoop and Run" | Stephen Cragg | Lisa Zwerling | November23,2006 |
| 277.0 | 10.0 | "Tell Me No Secrets..." | Laura Innes | Karen Maser | November30,2006 |
| 278.0 | 11.0 | "City of Mercy" | Stephen Cragg | David Zabel and Lisa Zwerling | December7,2006 |
| 279.0 | 12.0 | "Breach of Trust" | Skipp Sudduth | Janine Sherman Barrois | January4,2007 |
| 280.0 | 13.0 | "A House Divided" | Andrew Bernstein | R. Scott Gemmill | January11,2007 |
| 281.0 | 14.0 | "Murmurs of the Heart" | Christopher Chulack | David Zabel | February1,2007 |
| 282.0 | 15.0 | "Dying is Easy" | Tawnia McKiernan | Janine Sherman Barrois | February8,2007 |
| 283.0 | 16.0 | "Crisis of Conscience" | Steve Shill | Lisa Zwerling | February15,2007 |
| 284.0 | 17.0 | "From Here to Paternity" | Lesli Linka Glatter | Virgil Williams | February22,2007 |
| 285.0 | 18.0 | "Photographs and Memories" | Stephen Cragg | Karen Maser | April12,2007 |
| 286.0 | 19.0 | "Family Business" | Richard Thorpe | Joe Sachs | April19,2007 |
| 287.0 | 20.0 | "Lights Out" | Terrence Nightingall | Janine Sherman Barrois | April26,2007 |
| 288.0 | 21.0 | "I Don't" | Andrew Bernstein | David Zabel | May3,2007 |
| 289.0 | 22.0 | "Sea Change" | Laura Innes | Lisa Zwerling | May10,2007 |
Question:
What is the original air date of the episode directed by Terrence Nightingall?
Answer:
April26,2007