The series will premiere with the first half of a two-parter titled 'Arthur's Bane'.
© BBC / Shine/Nick Briggs
Series five will see the return of regular cast members Colin Morgan (Merlin), Angel Coulby (Gwen), Bradley James (Arthur), Katie McGrath (Morgana) and Richard Wilson (Gaius).
Co-creator and executive producer Johnny Capps also revealed at Comic-Con that Anthony Head will reprise his role as Uther Pendragon as a guest star.
Game of Thrones star Liam Cunningham was confirmed to join the cast back in April, while John Bradley will play a character named Tyr Seward.
Watch the cast of Merlin discuss the fantasy drama's fifth run with Digital Spy below:
