The Night Dr. Loveless Died - S3-E4
Continuity mistake: In the opening scene, a cowboy sitting atop the balcony above Big Brad's Bar gets up and approaches the balcony's edge twice.
Urutora sakusen dai ichi gô - S1-E2
Continuity mistake: The submarine is surrounded by burning trees, but when Hayata sticks his arm out to summon Ultraman there's nothing burning in the background. (00:19:40)