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 |
| --- | --- | --- | --- | --- | --- | --- |
| 86.0 | 1.0 | "Vegas" | Bryan Cranston | Michael Glouberman & Andrew Orenstein | November 2, 2003 | 06-03-501 |
| 87.0 | 2.0 | "Watching the Baby" | Levie Isaacks | Alex Reid | November 9, 2003 | 06-03-502 |
| 88.0 | 3.0 | "Goodbye Kitty" | Jimmy Simons | Gary Murphy & Neil Thompson | November 16, 2003 | 06-03-503 |
| 89.0 | 4.0 | "Thanksgiving" | David D'Ovidio | Matthew Carlson | November 23, 2003 | 06-03-504 |
| 90.0 | 5.0 | "Malcolm Films Reese" | Levie Isaacks | Dan Kopelman | November 30, 2003 | 06-03-505 |
| 91.0 | 6.0 | "Malcolm's Job" | Steve Welch | Maggie Bandur | December 7, 2003 | 06-03-506 |
| 92.0 | 7.0 | "Christmas Trees" | Steve Love | Alex Reid | December 14, 2003 | 06-03-507 |
| 93.0 | 8.0 | "Block Party" | Levie Isaacks | Rob Ulin | January 4, 2004 | 06-03-508 |
| 94.0 | 9.0 | "Dirty Magazine" | Bryan Cranston | Eric Kaplan | January 11, 2004 | 06-03-509 |
| 95.0 | 10.0 | "Hot Tub" | Jimmy Simons | Andy Bobrow | January 25, 2004 | 06-03-510 |
| 96.0 | 11.0 | "Ida's Boyfriend" | Peter Lauer | Neil Thompson | February 8, 2004 | 06-03-512 |
| 97.0 | 12.0 | "Softball" | Ken Kwapis | Michael Glouberman | February 15, 2004 | 06-03-511 |
| 98.0 | 13.0 | "Lois' Sister" | David D'Ovidio | Gary Murphy | February 22, 2004 | 06-03-513 |
| 99.0 | 14.0 | "Malcolm Dates a Family" | Steve Welch | Rob Ulin | March 14, 2004 | 06-03-514 |
| 100.0 | 15.0 | "Reese's Apartment" | David Grossman | Dan Kopelman | March 21, 2004 | 06-03-515 |
| 101.0 | 16.0 | "Malcolm Visits College" | Peter Lauer | David Wright | March 28, 2004 | 06-03-517 |
| 102.0 | 17.0 | "Polly in the Middle" | Steve Love | Matthew Carlson | April 25, 2004 | 06-03-516 |
| 103.0 | 18.0 | "Dewey's Special Class" | David D'Ovidio | Maggie Bandur | May 2, 2004 | 06-03-519 |
| 104.0 | 19.0 | "Experiment" | Bryan Cranston | Alex Reid | May 2, 2004 | 06-03-518 |
| 105.0 | 20.0 | "Victor's Other Family" | David Grossman | Eric Kaplan | May 9, 2004 | 06-03-520 |
| 106.0 | 21.0 | "Reese Joins the Army: Part 1" | Steve Love | Andy Bobrow | May 16, 2004 | 06-03-521 |
Question:
What was the original air for the 06-03-521 production code?
Answer:
May 16, 2004