After Mrs. Slocombe starts dropping hints that it's her birthday, the staff calculate that she is 50 and plan an appropriate party.

Rumors fly when Captain Peacock gets too friendly with Mr. Rumbold's secretary at the Christmas party, and things get really out-of-hand when it seems they might have spent the night together.

When the mechanical Father Christmas proves that it can't be trusted, Mr. Grace offers a bonus for one of the staff to portray the store Santa. Meanwhile, Mr. Humphries and Mr. Lucas attempt to help Mr. Grainger prepare for a song-and-dance show at an old-folks' home.

When Mr. Grace announces that he plans on temporarily reorganizing the departments, the staff are indignant, but find that work can be a lot of fun...if you're working in the toy department.

To celebrate Mr. Grace's 80th birthday, the staff organize This is Your Department, a spoof of This is Your Life.

The staff prevent another firm's hostile takeover of Grace Brothers by impersonating the shareholders. Mr. Harman gives a rousing speech, and Grace Brothers is saved.

The staff star in a TV commercial for Grace Brothers, produced by Mr. Humphries. Could Mr. Grace's cheapness be the reason for using his staff in such fashion?