As promised, fans of "How I Met Your Mother" would see Rachel Bilson again in the sixth season as Cindy. It looks like the graduate student is back in Ted's life and she brings along a blonde friend who could be 'the mother'.

In one of the photos released for the first return episode, Cindy is seen from afar talking to one girl who supposedly is played by Kaylee DeFer. Cindy is the biggest link to finding out who the mother of Ted's children is because it was revealed in the fifth season that she is the mother's roommate.

Most of the other pictures highlight the gang of five hanging out at their favorite spot, McLaren's. Robin in particular looks shabbier than usual, wearing sweatshirt and chewing on a burger.

"How I Met Your Mother" premieres the new season on September 20 with the first episode called "Big Days". When Ted and Barney argue about who has "dibs" on a hot girl, Ted realizes that she is there with Cindy, a girl he previously dated who is also the roommate of his future wife. Meanwhile, Robin is heartbroken over Don, and Marshall can't keep quiet about his desire to start a family.