Continuity mistake: When we see Ben, he's shaving his right cheek, removing some of the shaving cream. When he turns around to hug Caleb, most of the shaving cream is back on his cheek.
Mercy Moment Murder Measure - S1-E7
Factual error: Early in the episode, there is a long shot of Woodhull's farm, snow on the ground...and aeroplane vapor trails in the sky.
Mercy Moment Murder Measure - S1-E7
Deliberate mistake: When Abraham throws the secret note into the fire, he crumples it up before tossing it in. But then we see a shot of the note lying open and flat on the log before burning. Not only would the note not be able to uncrumple itself, it shows no sign of being crumpled in the first place. This was obviously done deliberately so the audience could read the note one last time.
Continuity mistake: When Judge Woodhull is shot and falls to the ground, his and Abraham's positions keep changing depending on the shot. In one shot the Judge will be on his side, but on his back in the next. And Abraham has both hands on his father's wound, and in the next shot, one on his father's upper chest.