Character mistake: In the final show, when Nesa and Smithy are getting married, Smith states his name as Niel Noel Edmund Smith, but that is actually his son's name, a.k.a. Niel the baby.
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.
Character mistake: Roxy always calls her mother Marda, but in the first episode, she is on the phone with her and she says, "Mom, I gotta go."
Character mistake: The date on Louise's plane ticket to London is listed as "Thursday 16 February 2017", but the month "February" is missing the U, misspelling it as "Febrary." (00:15:56)
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: Stella goes to the hospital to inform her daughter Sam about Hope dying. During the conversation, Stella calls her daughter Samantha and later on calls her Sarah twice.