Character mistake: In Season 5, Episode 4 ("The Heart Attack Boys"), Abishola twice gives Christina an injection without swabbing her skin with alcohol. Abishola is an RN and would never make that mistake.
Character mistake: Rufus says "That was before I found out you raped my 14 year old daughter." referring to Jenny. Jenny, in previous seasons is 15. Jenny was born in 1993, and season 4 was filmed in 2010, making Jenny 16 at least. (00:25:35)
Suggested correction: In this scene, Rufus saying, "my 14 year old daughter..." was referring to Jenny's age at the time Chuck tired to force himself onto her (beginning of the first season), not her current age in season 4. Jenny was 14 in the beginning of season 1.
Character mistake: Steffan addresses his brother, Daemon, as "Steffan" at The Grill after Ellina talks to Steffan about the crystal that plagues Bonnie with nightmares about Emily. (00:15:06)
Suggested correction: You missed the point of the scene. They were imitating each other. Stefan was pretending to speak as Damon. Damon replies with "I don't, Damon" and then "you're really hard to imitate".
Character mistake: S44/E80 Noah Newman works as a bartender, and while at Victor Newman's house says "let's show off some of those drink serving skills." While making a drink he pours straight vodka from the bottle into a martini glass and puts in olives and hands it to Abby to drink. As bartender Noah should know how to make a martini. He doesn't use any vermouth with the vodka and doesn't chill it first by shaking or stirring it before pouring it into the martini glass. (00:11:00)
Character mistake: When talking about poker Jimmy asks Dave "What are the chances of getting five of a kind of the same suit?" The most you can get is four of a kind and they would be all different suits.
Suggested correction: Jimmy says "in the same suit" which is slightly different than "of the same suit." It was just a weird way of saying the odds of getting a flush. Lisa replies with 504.8 (the odds of getting a flush). In poker lingo, 3 or 4 of a kind is taken to mean same value since 3 or 4 cards in the same suit isn't anything.
Suggested correction: Five of a kind is possible when using one or more wild cards, such as Jokers.
In the Waiting Room of Estranged Spouses - S2-E6
Character mistake: The former Marine, Spenser, refers to himself as a soldier. A Marine would never do that.