Sydney Bristow (Jennifer Garner) returns to her butt-kicking ways as ABC's "Alias" begins its final story arc, beginning tomorrow at 8 p.m. on WCVB (Ch. 5).

Loyal fans have been with Syd through the heart-stopping good (Sydney wakes up with two years of her life missing) and the tediously bad (Vaughn marries the nefarious Lauren). This season, to deal with Garner's real-life pregnancy, the series brought in such new characters as Syd's naive protege Rachel Gibson (Rachel Nichols) and sexy agent Thomas Grace (Balthazar Getty). The additions were the equivalent of an aging family sitcom adding a baby to the mix.

The final episodes promise to be an extended version of "Sydney Bristow: This Is Your Life." Her best guy pal, Will (Bradley Cooper), faux Francie (Merrin Dungey), evil nemesis Anna Espinosa (Gina Torres), sinister Sark (David Anders), spy mom Irina Derevko (Lena Olin) and loyal friend Agent Weiss (Greg Grunberg) are all slated to return.

When viewers last saw Syd in December, she was pregnant and stranded on a barge in the middle of an ocean while her father stumbled upon a baby room courtesy of Prophet Five.