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In this landmark episode, a mysterious Black Knight disrupts Prince Arthur's coming-of-age ceremony. Merlin discovers the knight is actually a wraith summoned from the dead to take vengeance on Uther Pendragon. To save Arthur, Merlin must seek the help of the Great Dragon to forge a weapon capable of killing the undead—the legendary sword . Is it Family Friendly?
: This series often appears on free, ad-supported streaming services, though availability can change monthly. Episode Plot: "Excalibur"
: While it aired on family-oriented networks like the BBC, it contains scenes of "malevolent magic" that might be intense for younger children.