Battlestar Galactica (2004)

S01E05 You Can't Go Home Again

Title: The Road Not Taken Plot: After Lt. Kara Thrace disappears during a training operation with a Cylon patrol, Commander Adama is consumed by guilt, particularly given her recent confession that she holds herself accountable for the death of his son, Zak. This personal connection intensifies his sense of duty to find her, as he grapples with the weight of her sorrow and his own feelings of responsibility.