The title of this show is a play on the title of the Shirley Jackson novel, The Haunting of Hill House, which has been adapted into film twice as The Haunting (1963) and The Haunting (1999).
Jen calls a waiter "Mick Hucknall". Years later, Katherine Parkinson appeared in Series 9, Episode 2 of comedy game show Would I Lie To You in which she had to lie that she was incapable of saying the name "Mick Hucknall" whenever it appeared in a script.
Jen looks at the waiter and says, 'Mick Hucknall'. Mick Hucknall was the lead singer of Simply Red, so named for his curly, flame-red hair. Simply Red had a number of hits in the 1980s and 1990s such as 'Holding Back the Years' and a well-received cover of 'If You Don't Know Me by Now'.