Gabrielle and Carlos are shocked when the father of their baby shows up to take the baby back. Cops and a lawyer arrive to a house on Wisteria Lane. Lynette tries to help Ed heat up his sex life. Meanwhile, Karl decides to break up with Edie, as Edie has no idea that Susan is the "other woman." Edie causes a fight to break out in a bar, after she trips a waitress. Lastly, Bree is taken a step forward to help Peter when she finds out how bad his other addiction is.

"The Gun Song" is the 86th episode of the ABC television series, Desperate Housewives. It is the sixteenth episode of the show's fourth season, and the first half of the two-hour season finale. It aired on May 18, 2008 in the United States.