S4E13 · Save Serenity

After stopping a late-night robbery in a bar, Victor Del Toro, once a member of the Pacific Blue unit, is on the verge of committing suicide on the Santa Monica pier. He's interrupted by a young woman looking for signatures for a petition to regain custody of her six year old daughter, now in the hands of a rich couple. Victor, in an effort to make up for the death of his fiancée, promises to capture the child for the mother. He takes advantage of his old friends and breaks numerous laws in his effort to trade his soul for that of the child, all under the suspicious eye of the new Pac Blue recruits.