Tunnels is an independent, serialized audio drama set around the passages under a small Georgia town. The tunnels are the fixed point: characters circle them, hide in them and get left for dead in them. Scenes play out as dialogue under pressure. In one, two people search dark woods for a woman who knows the ground better than they do, and one of them gets hit with a thrown rock. In another, a standoff hinges on a fifteen-second countdown and a promised bullet. A character questions a captured creature, asking whether it can understand what is happening or only runs on instinct, and whether it would warn the others if released. Beneath all this sits a family conspiracy. A brother was locked in an asylum while his sister, who believed in his grand plans, spent those years hiding in plain sight, going as far as marrying to keep her cover. One reveal, that Tatum is a character's sister, comes with a jab about how long it took everyone else to notice. The mystery also reaches back in time. 'A Better Idea' includes a journalist's recorded interview dated March 19, 1979, in which a widow, Mrs. Cotton, denies knowing anything about the tunnels and is told flatly that she is lying. Elsewhere, a hospital is described as a sore subject that cost people their positions of power, and one character suspects the newspaper kept quiet to avoid making the wrong enemies. Talk of wards that are no longer in place, creatures dismissed as vermin from a lost time and a passing mention of an elder god take the story past a local cover-up and into the supernatural. The characters keep a sense of humor, however dark. Even in a hospital bed after a stabbing, Tara has a joke ready about Barnabas botching the job. Robert, who writes and produces the series, has said the idea came to him on a morning drive to work. He introduced the fifth season as the final one, so the serial has an ending rather than an open-ended run. The cast includes Shannon, who voices Molly Madison. The feed also carries 'Ghosts of Griffin - Dear Santa', a Christmas episode released to everyone from a patron-only anthology series made by the Haunted Griffin team. It unfolds through a child's letters to Santa, with a fire coming up between complaints about getting the wrong video game console. Characters and grudges carry over from one episode to the next, so the show works best heard in order.