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 | Production code | U.S. viewers (millions) |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 133.0 | 1.0 | "The Ticket" | Christopher Misiano | Debora Cahn | September25,2005 | 2T6201 | 8.90 |
| 134.0 | 2.0 | "The Mommy Problem" | Alex Graves | Eli Attie | October2,2005 | 2T6202 | 7.66 |
| 135.0 | 3.0 | "Message of the Week" | Christopher Misiano | Lawrence O'Donnell, Jr. | October9,2005 | 2T6203 | 7.95 |
| 136.0 | 4.0 | "Mr. Frost" | Andrew Bernstein | Alex Graves | October16,2005 | 2T6204 | 8.15 |
| 137.0 | 5.0 | "Here Today" | Alex Graves | Peter Noah | October23,2005 | 2T6205 | 7.85 |
| 138.0 | 6.0 | "The Al Smith Dinner" | Lesli Linka Glatter | Eli Attie | October30,2005 | 2T6206 | 8.51 |
| 139.0 | 7.0 | "The Debate" | Alex Graves | Lawrence O'Donnell, Jr. | November6,2005 | 2T6207 | 9.58 |
| 140.0 | 8.0 | "Undecideds" | Christopher Misiano | Debora Cahn | December4,2005 | 2T6208 | 7.26 |
| 141.0 | 9.0 | "The Wedding" | Max Mayer | Josh Singer | December11,2005 | 2T6209 | 8.13 |
| 142.0 | 10.0 | "Running Mates" | Paul McCrane | Peter Noah | January8,2006 | 2T6210 | 11.74 |
| 143.0 | 11.0 | "Internal Displacement" | Andrew Bernstein | Bradley Whitford | January15,2006 | 2T6211 | 6.36 |
| 144.0 | 12.0 | "Duck and Cover" | Christopher Misiano | Eli Attie | January22,2006 | 2T6212 | 7.71 |
| 146.0 | 14.0 | "Two Weeks Out" | Laura Innes | Lawrence O'Donnell, Jr. | March19,2006 | 2T6214 | 8.07 |
| 147.0 | 15.0 | "Welcome to Wherever You Are" | Matia Karrell | Josh Singer | March26,2006 | 2T6215 | 7.90 |
| 148.0 | 16.0 | "Election Day Part I" | Mimi Leder | Lauren Schmidt | April2,2006 | 2T6216 | 7.27 |
| 149.0 | 17.0 | "Election Day Part II" | Christopher Misiano | Eli Attie & John Wells | April9,2006 | 2T6217 | 8.39 |
| 150.0 | 18.0 | "Requiem" | Steve Shill | Eli Attie, Debora Cahn & John Wells | April16,2006 | 2T6218 | 8.29 |
| 151.0 | 19.0 | "Transition" | Nelson McCormick | Peter Noah | April23,2006 | 2T6219 | 8.42 |
| 152.0 | 20.0 | "The Last Hurrah" | Tim Matheson | Lawrence O'Donnell, Jr. | April30,2006 | 2T6220 | 8.34 |
| 153.0 | 21.0 | "Institutional Memory" | Lesli Linka Glatter | Debora Cahn | May7,2006 | 2T6221 | 7.94 |
Question:
What is the number of this season's episode that had the production code 2t6206?
Answer:
6.0