"My Lucky Day" is the fifteenth episode of the American television drama series The Killing, which aired on April 1, 2012 as the second half of a two-part second-season premiere.

In the episode, Rosie Larsen's bloody backpack is dropped off at the garage's doorstep—a sign to her father Stan that the police arrested the wrong person.

Stan Larsen (Brent Sexton) wakes in the middle of the night to learn that his son Denny (Seth Isaac Johnson) thinks he heard someone outside.

On the phone, Lt. Michael Oakes (Garry Chalk) orders Holder to bring the backpack to the station immediately and give it to a technician named Stu (Darren Moore).

Holder ponders his boss' lies and Gil Sloane (Brian Markinson) tells him to stop speculating, adding that any blame on the case belongs to Sarah.

Detective Sarah Linden (Mireille Enos) visits Richmond's campaign adviser Gwen Eaton (Kristin Lehman).

Visiting Richmond, Sarah tells him she knows that he proposed to his wife on October 5, that each year was their anniversary, and that a fisherman had pulled him out of the water on the night of Rosie's murder.

Lori Rackl of Chicago Sun-Times stated: "This melancholy show isn't afraid to take a break from the sleuthing action to dwell on Rosie's suffering family.

"[1] The Washington Post's Hank Steuver called the episode "solid and corrective, even stylishly penitential in the way it recomposes itself and gets on with the mystery.

"[2] Dorothy Rabinowitz of The Wall Street Journal reflected on the episode by saying, "Everything that happens—new light cast on the character of a prime suspect, old bonds of love and family sundered by the pain of loss, trust between police partners shattered—gets its due scrutiny.

"[4] As the second half of a two-part season two premiere, "My Lucky Day" was watched by 1.80 million viewers, marking the series' fifth-lowest viewership.