You know her as:
The Earl of Grantham's best friend.
Why we like her:
The yellow Labrador played a pivotal role in the Season 2 Christmas special, when nasty Thomas tried to curry favor with the earl by secretly hiding and then "finding" his constant companion. Isis is also at the center of a real-life Downton Labby scandal: She replaced the first season's Pharaoh, who was written out of the show after clashing with the resident dogs of Highclere Castle, where "D.A." is filmed.
Where else you've seen her:
Frolicking, gobbling crepes suzettes in Mrs. Patmore's kitchen.
-- Drusilla Moorhouse, Zap2it