One of the main characters has his hand placed on a mill saw. It happens very quickly at around 14:00 mark of Episode 1. There isn't a close up of the hand, but there is a large splurt of blood. They exclaim in pain and pull their hand away as fast it was placed on it.
Since it happened out of no where, was over fast, and you didn't see the hand, this didn't upset me. However, if even the slightest suggestion of hand trauma triggers you, skip ahead about 2 minutes.
As another user pointed out, at minute 14:30 a person's hand is suddenly forced upon a mill saw for a brief moment. No close up or gore, but there is a burst of blood.
One character believes their loved one haunts their home and some "strange" phenomenon reinforces the belief. However, it is a coping mechanism and specters aren't the focus of this series.
At 14:30 a character's hand is pushed into a rotating saw without warning with a lot of blood. At around 15:05 it shows him unwrapping his fingers again to run under the tap with more blood.