Sci Fi Saturday movie

James Callis (BSG) as Merlin in Book of Beasts (or Merlin and the Book of Beasts according to IMDb, which says it's still in production). Set after the fall of Camelot; the band of heroes is Galahad, Galahad's son (!!), Tristram's son Tristram and Arthur & Guenevere's daughter. Worth it for this exchange:

MORDRED: Where is the sword thrown into the lake?!
MERLIN: I hid it.
MORDRED: You hid the sword?
MERLIN: I hid the lake.