The Watchtower - S4.E8

Slowly floating towards Wolf 359, untethered and separated from everyone else on the crew, Officer Eiffel tries a radical approach to solving the aliens' riddle. However, it's only a matter of time before he realizes the situation might be more complicated, more unpredictable, and more dangerous than he ever imagined. Plus, a place where the sidewalk ends, very necessary drama, the immortal words of Marvin Gaye, a momentary road bump, and the express train to Grand Central.