Catherine Bell is one busy actress these days, but she's bracing herself to resume her most demanding role.

Now working in Canada on an adaptation of April Smith's novel "Good Morning, Killer" for TNT's forthcoming "Mystery Movie Night," the actress returns next month to the South Carolina set of "Army Wives" to start production on Season 6 of the Lifetime drama series. She's looking forward to it, though she knows how emotional it will be to revisit the role of Denise Sherwood ... whose soldier son, Jeremy, was killed in combat in Iraq during last season's episodes.

"It's heartbreaking to have people who have sons and husbands over there talk to you about it," Bell tells Zap2it. "It's pretty intense. Those were really challenging episodes to do, but also very rewarding.

"Of course, I didn't want them to kill off 'my' son, and I talked to the writers about it: 'Really?...