WREN
The man on the radio has a name. Theo has a secret in his blood.
Sgt. Elias Wren, U.S. Army Signal Corps, left behind to keep the signal running. Every night at 3:17 this tower freezes the dead for four minutes. He put Riley's name on the air to bring Theo to him, and cut the broadcast early so the army couldn't trace her. On day one, St. Agnes tested every child in Harlow Bay. Theo's blood came back clean: he's immune. Then the soldiers start cutting through the fence.
The last choice. This vote decides the ending.
What happened · AThe ending you chose: hidden under the tower all day, then four minutes at 3:17 to walk through the frozen valley while Wren stays behind to send the signal.
The road not taken · BThe unplayed ending: Theo goes with the army and Riley goes with him. At 3:17 it's Theo's voice on the broadcast, reading names of survivors to be rescued, not hunted.
The road not taken · CThe unplayed ending: at 3:17 there is only silence, true dead air. The army is blind, the dead are free, and Riley and Theo vanish into the dark.