The Tale of the Book of Secrets - S4-E12
Character mistake: A Bed and Breakfast is named "De La Sol." That is incorrect in Spanish. Sol is masculine, and should be named "Del Sol." (00:15:15)
Blindspot (2015)
1 character mistake in The Tale of the Book of Secrets - chronological order
Starring: Rob Brown, Jaimie Alexander, Sullivan Stapleton, Audrey Esparza
Regard a Mere Mad Rager - S2-E19
Continuity mistake: When Reade is in Weller's office, his face is still pretty bruised, especially around his left eye and cheek, from the drug dealers beating him. When he's talking to Zapata outside of Weller's office, his face isn't as bruised up.
Trivia: Since episode 10 of season 2, "Nor I, Nigel AKA Leg in Iron", all the episode names (at least to episode 21) are palindromes (a word or phase spelled the same forward or backwards).