The first season of this comedy series witnesses a chain of events triggered when a mysterious letter writer contacts five seemingly disparate characters with the chilling message: “I know what you did.” There’s Mr Lomax, a blind recluse with an unusual hobby; Robert, a telekinetic dwarf; Mr Jelly, an embittered hook-handed clown; David, a serial-killer-obsessed man-child, and Joy, a deranged but caring midwife.