Complex sentence: Later, Olivia follows Nina Sharp, only to find herself kidnapped by a "watcher" (the Observer, played by Michael Cerveris) working for Sharp who attempts to kill her by placing Olivia in a wooden crate and sending it out to sea.
Split into simpler sentences: Later, Olivia follows Nina Sharp, only to find herself kidnapped by a "watcher" (the Observer, played by Michael Cerveris) working for Sharp. The watcher attempts to kill Olivia by placing her in a wooden crate and sending it out to sea.