|The Last Stand|
|Season 4, Episode 10|
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| Corey Stoll as Ephraim Goodweather|
David Bradley as Abraham Setrakian
In the series finale, Quinlan devises a desperate plan, but the costs are enormous. Eph wrestles with his conscience; Fet undertakes a suicide mission; and Dutch and Gus dig in for battle as humankind makes its final stand against the Master and his Strain.
- The Third Water Tunnel, is a real-world project, which was designed to supplement the other water tunnels supplying the city. The more mission-critical reason was to allow the water tunnels to be shut-down for necessary maintenance.