BEVERLY HILLS, Calif. -- A "Downton Abbey
" sneak peek at season three revealed that fireworks will fly between matriarchs played by Maggie Smith
and newcomer Shirley Maclaine
.The aristocratic Crawley family endures a financial crisis. And, despite the engagement of Matthew and Mary at the end of last season, all is not well - gasp! - with the pair played by Dan Stevens and Michelle Dockery.PBS showed brief clips from next season ...