When a Child is Born (2) - S4-E28
Other mistake: Not to sound rude, but Jane (Seymour) was literally pregnant, in labor when her water broke, but no visible staining on her gown or on the wagon seat when Sully pulls her up.

Starring: Jane Seymour, Joe Lando, Shawn Toovey, Chad Allen
When a Child is Born (2) - S4-E28
Other mistake: Not to sound rude, but Jane (Seymour) was literally pregnant, in labor when her water broke, but no visible staining on her gown or on the wagon seat when Sully pulls her up.

Visible crew/equipment: While Dr. Mike is unsuccessfully trying to make supper Olive returns with the children, and after Olive says goodbye to them, when Dr. Mike closes the door a white T-mark is visible on the porch. (00:08:55)
Dr. Michaela 'Mike' Quinn: Dorothy's overcome so much herself. I think she means this book to be inspirational. I'm sure she didn't mean to offend anyone.
Hank Lawson: You read it?
Dr. Michaela 'Mike' Quinn: I haven't had time yet. I'm looking forward to reading it this afternoon.
Hank Lawson: Where exactly you gonna be when you're readin' it?
Dr. Michaela 'Mike' Quinn: The clinic, I suppose. Why?
Hank Lawson: Might wanna steer clear of that part of town today, folks.
Answer: A Cooper was someone who made various things out of wood including wooden caskets and even barrels.