Watch The Mercury Men online: Episode 4 Engineer Attack

Trapped in an elevator with a Mercury Man, Edward Borman fights for his life. As the creature attempts to choke Borman to death, the door opens, and Yaeger intervenes. A fistfight ensues, with the Mercury Man quickly gaining the upper hand. Fortunately, Borman is able to find Yaeger's pistol and, even without his glasses, gets it to the Captain, who shoots his attacker dead. In the aftermath, Yaeger and Borman have it out, with the latter hoping to escape rather than help his rescuer shut down the gravity engine. A heartfelt speech from Yaeger, however, convinces Borman that there's more at stake than one man's life. The pair head up to the top floor to seek the source of a signal that's leading the Mercury Men, and find it: A brain in a jar.

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