In season three, when the traitors of the Night's Watch kill Craster the wildling and Lord Mormont, Sam rushes to Gilly's hut and urges her to flee from Craster's Keep. During their escape, the pair encounter a White Walker that Sam kills with a dragonglass dagger, making him the first person on the series to defeat one of the undead in this manner. As we all know, the pair eventually fall in love, sharing a kiss in the penultimate episode of season four and consummating their relationship soon thereafter.