The cast for Marvel's upcoming Netflix series A.K.A. Jessica Jones is getting more impressive by the day.  The Matrix star Carrie-Anne Moss has joined the series as a potential ally to Jones.  Per Marvel:

Moss plays a no-nonsense woman who could prove a powerful ally to Jessica...if Jessica doesn’t completely alienate her first.

Moss joins an already impressive (and rapidly growing) cast, featuring Krysten Ritter in the title role and Mike Colter as hero-for-hire Luke Cage.  Last week we reported that David Tennant signed on to play the villainous "purple man" Killgrave, and just a few days ago we learned that Rachael Taylor signed on to play Jones' best friend, Trish Walker.

A.K.A. Jessica Jones is shaping up to be a really promising show.  So far the cast is excellent (and it's about time Ritter got a post-Don't Trust the B leading role), the premise is intriguing, and without the limitations of ad-supported programming the series has the possibility of getting darker than anything we've seen from the MCU yet.  The 13-episode series spearheaded by Executive Producer/Showrunner Melissa Rosenberg (Dexter, The Twilight Saga) is set to air in 2015 and is the second of five planned Marvel-Netflix collaborations.  The others include Daredevil, which will debut April 10th, Luke Cage, Iron Fist, and The Defenders.

Here's the official synopsis:

After a tragic ending to her short-lived super hero stint, Jessica Jones (Krysten Ritter, Don’t Trust the B—- in Apt. 23) is rebuilding her personal life and career as a detective who gets pulled into cases involving people with extraordinary abilities in New York City. An enigmatic figure from Jessica’s past, Kilgrave’s reappearance will send shockwaves through the former super hero’s world.