ABC Sets Premiere Dates for 'Galavant' and 'Marvel's Agent Carter' Plus Return Dates for Five Dramas

ABC has announced premiere dates for two of its highly anticipated new midseason shows - Galavant, a comedy extravaganza and Marvel's Agent Carter, the second action packed series from the creative minds at Marvel, inspired by the feature films Marvel's Captain America: The First Avenger and Marvel's Captain America: The Winter Soldier, along with the short Marvel One-Shot: Agent Carter. Galavant will premiere on Sunday, January 4 (8:00-9:00 p.m. ET) and will run two episodes in the one-hour block each week, and Marvel's Agent Carter premieres on Tuesday, January 6 (9:00-10:00 p.m. ET).

Once Upon a Time will return on Sunday, March 1 and Marvel's Agents of S.H.I.E.L.D. will return on Tuesday, March 3 in their regular time periods with all-new episodes.

The hit TGIT Thursday night dramas, Grey's Anatomy, Scandal, and How to Get Away with Murder, return Thursday, January 29.

John Stamos to Guest Star on ABC Musical Comedy 'Galavant' as a Singing Knight

John Stamos

John Stamos (Full House, General Hospital) will guest star in the upcoming ABC musical comedy series, Galavant, about a hero living among corrupt royals, noble knights and more.

"We are absolutely thrilled that John Stamos is joining us on the series as Galavant’s longtime rival -- a dashing knight who squares off against him once more in a local joust," executive producer Dan Fogelman told ABC News in a statement. "We’ve wanted John to do an arc on this show since inception."

Stamos will begin filming next month in Bristol, England. While he'll definitely be in at least one episode, there is a chance he will return for more as the show goes on. Fogelman would certainly welcome the opportunity to work with the "Full House" veteran as long as possible.

"He's funny as hell, and he sings, and he looks like Lancelot wishes he looked," he said. "We can’t wait!"