S06e15 -

: It centers on the childhood of Jacob and his nameless brother (the Man in Black), revealing how their "Mother" groomed them to be protectors of a mysterious "light".

In other series, the s06e15 slot often marks a turning point in character development: : S06E15, "East," s06e15

For Lost , s06e15 titled "Across the Sea" serves as a vital prequel that explains the origins of the Island's central conflict. : It centers on the childhood of Jacob

In Supernatural , s06e15 titled " The French Mistake " is widely considered one of the series' most creative risks. The episode transports the protagonists, Sam and Dean Winchester, into a "parallel universe" where they are actors named Jared Padalecki and Jensen Ackles filming a TV show called Supernatural . " For Lost