An official dispatched to the town due to his expertise with local tunnels. He forms a spelunking crew to investigate sinkholes and confront the supernatural entity. After surviving the cave attacks, he discovers the creature's vulnerability to bright light and sunlight, ultimately helping to trap it, though he is traumatized by the experience.
Rob and Penny share a past romantic history, now reconnected as teammates.
Rob and Steve work together as part of the underground investigation team.
Rob and Katie collaborate during the tunnel expedition.
Rob and Trish are fellow members of the cave exploration team.
Rob and Ken operate as teammates during the underground mission.
Rob and Sarah are allied as members of the spelunking team.
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