Horror in the Heights - S1-E11
Revealing mistake: The bulky material/block that secures the crossbow arrow shot into Miss Emily's torso can be seen under her clothing.
Kolchak: The Night Stalker (1974)
1 revealing mistake in Horror in the Heights - chronological order
Starring: Darren McGavin, Simon Oakland, Jack Grinnage, Ruth McDevitt
They Have Been, They Are, They Will Be... - S1-E3
Continuity mistake: While Tony Vincenzo is eating, his butter knife instantly turns into a fork in the next shot.
Carl Kolchak: If you want a job done right, you just have to foul it up yourself.
Trivia: Lara Parker, who plays Madelaine the witch in this episode, also played Angelique, the witch in the TV series, "Dark Shadows."