Episode 1 was actually the second episode to be shot.
The show was created by former EastEnders (1985) writer Tony Basgallop. Several EastEnders (1985) cast alumni have featured in the series, notably Tamzin Outhwaite in the first two seasons and Nigel Harman in its fourth and final season.
Only one set was used for the hotel rooms. The set would be redressed continually to represent different suites.