Episode Title: "The Visit"
Air Date: October 17, 2010
Written by: Julian Fellowes
Directed by: Brian Kelly
Synopsis:
The fair arrives in the village, and Mrs. Hughes finds herself the center of speculation when she meets a former suitor who makes her question her position at Downton. Also, Violet and Isobel are in conflict over a medical ailment affecting Molesley. Elsewhere, Carson fears there is a thief at Downton.
Cast 
 

Hugh Bonneville
...
Robert Crawley, Earl of Grantham

Jessica Brown Findlay
...
Lady Sybil Crawley

Laura Carmichael
...
Lady Edith Crawley

Jim Carter
...
Charles Carson

Brendan Coyle
...
John Bates

Michelle Dockery
...
Lady Mary Crawley

Siobhan Finneran
...
Sarah O'Brien

Joanne Froggatt
...
Anna Smith

Thomas Howes
...
William Mason

Robert James-Collier
...
Thomas Barrow (as Rob James-Collier)

Rose Leslie
...
Gwen Dawson

Phyllis Logan
...
Mrs. Hughes

Elizabeth McGovern
...
Cora Crawley, Countess of Grantham

Sophie McShera
...
Daisy Robinson

Lesley Nicol
...
Mrs. Patmore

Maggie Smith
...
Violet Crawley, Dowager Countess of Grantham

Dan Stevens
...
Matthew Crawley

Penelope Wilton
...
Isobel Crawley

Kevin Doyle
...
Joseph Molesley

Bill Fellows
...
Joe Burns

Elizabeth Hill
...
Nurse

Allen Leech
...
Tom Branson

Martin Reeve
...
Clerk

David Robb
...
Dr. Clarkson