Fans can't wait for the return of their favourite TV shows such as "Revenge," "Once Upon a Time," "Marvel's Agents of S.H.I.E.L.D," and "Castle" and many more. ABC has finally announced its fall line-up and premiere dates of its returning blockbuster TV shows. Here are top 5 must watch shows in Fall 2014. Head inside to find out the details including airdates and what to expect when the show returns. [Warning: Spoilers Alert!]

1. Castle Season 7: The much awaited show will pick up from where it left. "Castle" Season 6 ended with a bomb of a cliffhanger when the most anticipated wedding did not take place. Kate Beckett's bridegroom Rick Castle is missing and no one knows what happened to him. Fans are eagerly waiting to find out what happens next. "With the mythology that we're introducing, we want to start it off with a bang," show runner Andrew W. Marlowe told TV Line, earlier in May. "Castle" Season 7 will also introduce some exciting new characters such as Henry, a doctor, and more. The show premieres on Sept. 29 at 10:00 pm.

2. Grey's Anatomy Season 11: ABC's long-running medical drama will resume with its eleventh installment in September 2014. Shonda Rhimes creation will pick up from where it left, without any time jump, after the heartbreaking departure of one of the show's leading character Christina Yang. Shonda Rhimes told TV Line that the show will now focus on Meredith Grey- who is dealing with her best friend's loss and her husband's decision of leaving the family behind for new job in Washington. At the same time, the show will explore old and new storylines. Fans are excited to see what the half-sister twist will bring to the show and how Meredith will deal with it, especially after losing Lexie. "Grey's Anatomy" Season 11 premieres on Sept. 25 at 8:00pm.

3. Marvel's Agents of S.H.I.E.L.D. Season 2: "Marvel's Agents of S.H.I.E.L.D." did go through a difficult patch before making an impression on Marvel fans. However, the events of the final few episodes have left its fans eager to know what happens next in season 2. When the show ended, S.H.I.E.L.D. was left shattered and the responsibility of rebuilding a corruption free organisation was handed over to Phil Coulson. The show will follow the events after "Captain America: The Winter Soldier" and HYDRA revelation. "He's a very different Coulson than the guy who everyone knew. A lot of people who knew him in the old days say, "He's different," Clark Gregg told IGN. Season 2 premieres on Sept. 23 at 9:00 pm.

4. Once Upon a Time Season 4: ABC's fairy tale drama has now got an official airdate. "Once Upon a Time" Season 4 premieres Sept. 28 at 8:00pm with the episode titled "A Tale of Two Sisters." According to the spoilers, the show will kick off with a dramatic storyline revolving around Anna and Elsa from "Frozen." Fans will get to see a new face of beloved ice queen Elsa in the show. She will be treated as a villain and will often be misunderstood.

5. Revenge Season 4: ABC's drama thriller Revenge will return with its Season 4 to resolve a bulldozer of Season 3 finale cliffhanger. The show returns on Sept. 24 at 10:00pm. Fans know that Emily's father is alive and the twist is going to leave Emily and Victoria's lives changed forever. "It's going to be a father-daughter relationship season" show's producers Gretchen Berg and Aaron Harberts told E!Online. "The drive of season four will be Emily discovering who Amanda Clarke is and Emily figuring out her new life with her father in it," EP added.

Besides these top 5 TV shows, some other great TV shows returning this fall are: "Scandal" on Sept. 25, "Dancing With the Stars" on Sept. 15, "Modern Family" on Sept. 24 and more.