Hearts and Flowers (aka aka Servant of Two Masters) - S4.E9

To make ends meet, Simon Tremayne takes Hetty as his ""silent"" partner in the hotel. Hetty thinks she can make money by holding a Valentine dance; but a health inspector almost closes the hotel down when he finds a 100 year old bird, dead, in the ice house. Arthur wants to dance with Felicity, who has agreed to go to the dance with Gus, who is being pursued by Chef Pierre's French niece, Suzette.