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:
| Episode # | Title | Part 1 | Part 2 | Part 3 | Part 4 | Part 5 | Part 6 |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1.0 | "Pilot" | November 11, 2007 | November 11, 2007 | November 15, 2007 | November 18, 2007 | November 22, 2007 | November 25, 2007 |
| 2.0 | "Compromise" | November 29, 2007 | December 2, 2007 | December 6, 2007 | December 9, 2007 | December 13, 2007 | December 16, 2007 |
| 3.0 | "Anxiety" | December 20, 2007 | December 23, 2007 | December 27, 2007 | December 30, 2007 | January 3, 2008 | January 6, 2008 |
| 4.0 | "Goodbyes" | January 10, 2008 | January 13, 2008 | January 17, 2008 | January 20, 2008 | January 24, 2008 | January 27, 2008 |
| 5.0 | "Finding a Voice" | January 31, 2008 | February 3, 2008 | February 7, 2008 | February 10, 2008 | February 14, 2008 | February 17, 2008 |
Question:
When did the part 1 of the episode "Anxiety" air?
Answer:
December 20, 2007