In CBS’s Madam Secretary episode titled “The Detour,” Madam Secretary’s husband, Henry (Tim Daly), is brought into an FBI investigation of a Christian doomsday cult called The Covenant of John. Raided by authorities in their operation in Bolivia while he was there, Henry has knowledge of the militia group and sets out to determine if Rex Mayfield (James McCaffery), a cult member now living in eastern Virginia, is the bomb-maker responsible for selling the bomb used on an Illinois coffee shop attack on orders from ISIS leader al-Mutaya.