It was a depression she just couldn't shake. "My mom had a stroke, and I've been commuting back to England to be with her," says Jane Seymour, the actress once dubbed "queen of the miniseries," who traveled back home for a visit just last month. As she sits on a bench at the Malibu Performing Arts Center during a break from rehearsals, Seymour, still lithe and elegant at 56, is explaining why she chose to become the oldest woman ever to tackle the intense dance marathon that is Dancing with the Stars. It was a decision she once thought would be, in a word, "ridiculous."
"My husband's doing a film called Waiting for Forever," says Seymour (she's married to film and television director James Keach). "And the casting director for that happens to be married to one of the c