"Downton Abbey" Season 3 premieres on PBS

"Downton Abbey" returned to American television sets on Sunday night, when the period drama's third season premiered on PBS.

The two-hour episode brought new financial woes for the Crawley family, but also happiness in the form of a wedding.

Lord Grantham learns that a bad investment he's made means that much of his family's money -- including wife Cora's fortune -- is now gone.

But, there may be a solution. Matthew Crawley learns he is set to inherit a lot of money from the father of his late fiancee, Lavinia Swire. The inheritance could save Downton, but Matthew does not want to take the money because he feels guilty about Lavinia's death.

Behind the scenes at "Downton Abbey"

This leads to a fight between Matthew and Mary that almost derails their wedding. But a little help from Anna and Tom (the former chauffeur, now Lady Sybil's husband) puts them back on the same page, and the two say "I do."

Sunday's episode also introduced Shirley MacLaine as Martha Levinson, Cora's mother, who visits from America to attend the wedding. She spends much of her time in the episode trading barbs with the Dowager Countess.

We also got to see a pregnant Lady Sybil return from Dublin to Downton with Tom for her sister's nuptials. Other happenings in the episode include a new love interest for Lady Edith, Anna working to prove Mr. Bates' innocence, a health scare for Mrs. Hughes and a new footman (O'Brien's nephew, Alfred) joining the downstairs staff.

Tell us: What did you think of the "Downton Abbey" premiere?