When Jackie and Charlie are in the room with the dead man the blood pool from his head goes from a wide pooling area to closer to his body.
Rebecca and Charlie use a bottle of very expensive, 1796, Napoleon Cognac (which Charlie purloined from Gino's cellar) during their drunken kitchen activities.
Gino offers Tony an 'incentive' of a bottle of 1997 Coeur de Cuvée to help him with the auditor. This is a good champagne.
Tony offers Miss Merchant lunch at The Ivy. This is one of London's top theatre restaurants, opened in 1917 by Abel Glandellini and Mario Gallati.
The English game-show host Les Dennis plays himself in this episode. He's found stealing everything he can from his hotel room.
Gino gets on the wrong side of the visiting auditor, Ms Merchant, nicknamed "The Ball Cruncher" - and she lives up to her name.
There is a good scene in this episode when Tony the cool Concierge leads the staff in a capella version of the song Under the Boardwalk.
Rebecca and Mark stay at the Hotel Cipriani in Venice. This is a five-star hotel on Giudecca Island, three minutes by water taxi from St Mark's Square.
When we first see the janitor mopping up somewhere in the bowels of the hotel, a mouse runs across in front of him.
While Natalie is waiting for Charlie, she turns on the tv in the hotel room. Ready, Steady, Cook with Ainsley Harriott is the programme that's on.
James, the restaurant manager, suggests Bitto Valtellina cheese for the wedding. This is a rare cheese from Valtellina in the Italian Alps, a blend of cows' milk and goats' milk.
Long-term guest Mr Daniels appears to suffer from Obsessive Compulsive Disorder, a mental condition usually associated with excessive obsessions or rituals. The mind gets stuck on a particular thought or urge. Modern treatments can often cure it or relieve long term symptoms.
Gino mentions Glen Garioch '58, a single malt Scotch whisky. The Glen Garioch distillery, in the Valley of the Garioch, dates from 1797.
Tony fetches Porcelana chocolates for a guest. Porcelana is a rare dark chocolate from Venezuela, with a nutty flavour.
Anna refers to Studio 33. This is a London nightclub, near the Vauxhall Bridge.
The actor Jamie Theakston has an uncredited role as 'the Celebrity'.
Max Beesley (Charlie) plays the drums during the music montage of the hotel's night-time sequence.