The Legend of Prince Valiant S01 E21 The Dawn of Darkness

Dragons are being blamed for a series of devastating attacks that are obliterating Camelot's fortresses. Sir Bryant and the trio visit the estate of Lord Maldon to see what he knows, but the son of one of Arthur's old enemies refuses to treat the threat seriously. Furthermore, there is a secret project going on deep in Maldon's bell factory that the group suspects could mean trouble. Valiant's attempt to secretly spy on their host leads to a revelation that could spell the end for Camelot.