Her death scene was received positively by critics, earning it a spot on multiple "top moments of the season" lists.
A heavily pregnant Danielle Rousseau (Mira Furlan) and her husband Robert (Guillaume Dabinpons) along with the rest of their crew, shipwrecked on the island, 16 years before the crash of Oceanic Flight 815, during a French scientific expedition.
That night, Benjamin Linus (Michael Emerson) and a young Ethan Rom (William Mapother) are ordered by Charles Widmore (Alan Dale) to kill Danielle and, subsequently, her baby, Alex.
Instead, unwilling to kill an innocent child, Ben neglected Widmore's orders and kidnapped Alex to raise her as his daughter and let Danielle live.
[2] Sixteen years later, Alex meets the pregnant woman Claire Littleton (Emilie de Ravin), whom the Other, Ethan Rom, had kidnapped to take her baby.
She agrees to let them back to the main island so long as they help rescue her boyfriend, Karl (Blake Bashoff).
She is surprised when Sayid (Naveen Andrews), part of the rescue party that has arrived to get Jack, says that he knows her thought-to-be deceased mother.
She later unknowingly walks past Danielle Rousseau, her mother, while taking Locke (Terry O'Quinn) to the Other's submarine at Ben's request.
[7] After he is initiated,[8] Alex approaches Locke, and gives him a pistol, claiming he'll need it if he was planning to meet the leader of the Others, Jacob (Mark Pellegrino).
Alex sets off a distress signal at the electric fence surrounding the Barracks to warn Ben and the others that the mercenaries were coming.
Ben is spared but as his punishment, the Monster (in the form of Alex) ordered him to follow and listen to John Locke's every word and never again to try to harm him in any way or he will bear the consequences.
Mira Furlan met Raymonde for the first time just minutes before shooting their reunion scene in the season three finale.
[16] Jeff Jensen from Entertainment Weekly described Alex's death scene as "hardcore", commenting that it will be "sitting very high on this ranking of all-time pivotal Lost moments" by the end of the series.