Season 1

The Older Man
Phone Calls
The Teapot
Security
Romantic Complications
The Birthday

Special

S- 1 A Quiet Christmas

Season 2

Intellectual Aspirations
Open Secrets
Memory Games
The Cold
Wedding Bells
Lines of Communication
Gossip
Out on a Limb
Upstagers
Idle Speculation
Efficiency
Going Away

Special

S- 2 A Week of Sundays

Season 3

Mr. Right
Curiosity
Home Comforts
Relative Movement
The Dinner Party
Mr. Fixit
Charity
The Mysterious Affair at Bygone Books
Party Politics
Unforseen Circumstances
Family Album
Last Chances

Season 4

Dependent Relatives
Poor Relations
A Fully Extended Family
Yes and No
The Married Man
The Other Married Man