Audio problem: When they are trying to escape Koopa and the little caveman speaks, then Luigi answers him, he has the Princess' voice.
Continuity mistake: In season 1 Hobbie was 13 and in season 2 he is 10 years old.
The Leap Home (1) - November 25, 1969 - S3-E1
Factual error: The Post Raisin Bran cereal box sitting on the Beckett family breakfast table in 1969 has a 1990s box design. (00:18:00)
The Ringer - S1-E1
Continuity mistake: Zelda has an amateur magician grow a large plant for her to use as a sling shot. He is standing beside Link as it grows and then suddenly disappears between shots. There was not enough time for him to have walked or run away. (00:11:40)