- After Don Fadrique crashes Ortigosa's wedding, Julián finds the real actors who were going to recreate Constanza's legend on the ground. He rushes to them and says that they are alive, but we never see them again. What happened to them? If Don Fadrique's guards had attacked them, they would be dead for sure.
- In the 5th episode, "Cualquier tiempo pasado", why did Amelia have the receipt sent to Irene in 1981? Why didn't she just take it with her back to the Ministry? After all the trouble they went through to get this document, you'd think she'd be unwilling to let it out of her sight.
- The receipt had to look old enough to be legitimate. If she had merely brought it back through a time door, then it would look like it had just been written a few hours ago (thus an obvious forgery, instead of the decades-old historical document as it was supposed to be).
- Why don't the American agents buy the original 'El Quijote' after it was officially printed? Their plan was simply buy it off Cervantes and bring it back to the present, but since the origial book was then never printed, the book wouldn't exist in the unfolding History and so, in the new present the original woud only be valued as an undiscovered novel by a slightly-higher-than-average XVI century Spanish author (still rare and valuable, but only a minuscule fraction of the price it could aspire to). Did they really lack the foresight, did they not understand the concequences of changing History?
- In the Season 2 finale: Why would Philip II prevent/eliminate Don Quixote, Lazarillo de Tormes, or purge Goya? And why would "fútbol" be called that and not "balompié"?
Headscratchers / The Ministry of Time