The Good Wife Julianna Margulies returns to the small screen on Sunday, Sept. 21. "The Good Wife" will premiere on CBS at 9:30 p.m. ET/ 9 p.m. PT. Photo: CBS

Say goodbye to summer reruns on TV. Six shows – new and returning – are set to premiere on Sunday, Sept. 21.

The night kicks off on the East Coast at 8 p.m. with the Season 7 premiere of “Miss Marple” on PBS. At 8:30 p.m. (8 p.m. PT) TV lovers can get sucked into a brand new series starring Téa Leoni, CBS drama “Madam Secretary.” For the younger crowd, Season 2 of Disney Channel’s “Liv & Maddie” will premiere at the same time. At 9:30 p.m. (9 p.m. PT) viewers can catch up with Alicia Florrick (Julianna Margulies) on the Season 6 premiere of the hit CBS show “The Good Wife.”

The fun will continue on Adult Swim at 11:30 p.m. with the series premiere of “Mr. Pickles” and the Season 9 premiere of “Squidbillies” at 11:45 p.m.

Check out episode descriptions for Sunday’s lineup below and let us know what you’ll be tuning in to watch:

“Miss Marple” (8 p.m. ET on PBS)

Miss Marple (Julia McKenzie) will be on vacation when Season 7 of the PBS mystery series premieres, but that doesn’t mean she’ll be taking a break. When a fellow guest suddenly dies it’ll be up to Miss Marple to investigate his death – which leads to a “web of deceit, murder and dark magic.”

“Madam Secretary” (8:30 p.m. ET/ 8 p.m. PT on CBS)

Get ready to meet newly-appointed Secretary of State Elizabeth McCord (Téa Leoni) – who immediately gets sucked into “complex political challenges” and an international hostage situation. But this new CBS drama doesn’t just follow Elizabeth’s time at work, it also explores the major changes that her and her children are dealing with at home.

“Liv & Maddie” (8:30 p.m. ET on Disney)

Who is ready for the annual Wisconsin Cheddar Brat Cheese Easting Contest? Disney Channel’s Season 2 of “Liv & Maddie” will return with Liv (Dove Cameron) ecstatic to partake in the festivities after missing them for four years. The only problem is that on the same night Liv is supposed to be at a signing for the premiere of “The Space Werewolves.”

“The Good Wife” (9:30 p.m. ET/ 9 p.m. PT on CBS)

Season 6 of “The Good Wife” will premiere with Alicia (Julianna Margulies) in a difficult spot. Eli (Alan Cumming) wants Alicia to run for State’s Attorney, but Alicia is bent on not getting involved. Meanwhile, episode 1, “The Line,” will also find Diane (Christine Baranski) considering joining Florrick/ Agos as a partner.

“Mr. Pickles” (11:30 p.m. ET on Adult Swim)

Adult Swim’s new animated comedy, “Mr. Pickles,” is about 6-year-old Tommy Goodman (Kaitlyn Robrock), his family and their Border Collie, Mr. Pickles (Will Carsola). The show follows Tommy and Mr. Pickles as they embark on adventures. However, Mr. Pickles has a dark secret – he likes to “kill, mutilate and hump his victims.”

“Squidbillies” (11:45 p.m. ET on Adult Swim)

“Squidbillies” is back for another season. Fans can look forward to seeing Early (Unknown Hinson) get involved in the fight for marriage equality in the Season 9 premiere.

What will you be watching? Send your tweets to @AmandaTVScoop.