| Title | Season | Episode # | First Aired |
|---|---|---|---|
| Marge's Son Poisoning | 17 | 5 | Sunday November 13, 2005 |
| Margical History Tour | 15 | 11 | Sunday February 8, 2004 |
| Maximum Homerdrive | 10 | 17 | Sunday March 28, 1999 |
| Mayored to the Mob | 10 | 9 | Sunday December 20, 1998 |
| Midnight Rx | 16 | 6 | Sunday January 16, 2005 |
| Midnight Towboy | 19 | 3 | Sunday October 7, 2007 |
| Milhouse Doesn't Live Here Anymore | 15 | 12 | Sunday February 15, 2004 |
| Milhouse of Sand and Fog | 17 | 3 | Sunday September 25, 2005 |
| Million Dollar Abie | 17 | 16 | Sunday April 2, 2006 |
| Million Dollar Maybe | 21 | 11 | January 31, 2010 |
| Miracle on Evergreen Terrace | 9 | 10 | Sunday December 21, 1997 |
| Missionary: Impossible | 11 | 15 | Sunday February 20, 2000 |
| Moaning Lisa | 1 | 6 | Sunday February 11, 1990 |
| Mobile Homer | 16 | 13 | Sunday March 20, 2005 |
| Moe 'N' a Lisa | 18 | 6 | Sunday November 19, 2006 |
| Moe Baby Blues | 14 | 22 | Sunday May 18, 2003 |
| Moe Goes from Rags to Riches | 23 | 12 | January 29, 2012 |
| Moe Letter Blues | 21 | 21 | May 9, 2010 |
| Mom and Pop Art | 10 | 19 | Sunday April 11, 1999 |
| Mommie Beerest | 16 | 7 | Sunday January 30, 2005 |
| Moms I'd Like to Forget | 22 | 10 | January 9, 2011 |
| Mona Leaves-a | 19 | 19 | Sunday May 11, 2008 |
| MoneyBART | 22 | 3 | October 10, 2010 |
| Monty Can't Buy Me Love | 10 | 21 | Sunday May 2, 1999 |
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