Arrow (2012)

The Magician - S3-E4

Revealing mistake: When Oliver meets Thea at the Grind and Jot Cafe (Which looks unsurprisingly like CC Jitters) you can see the cups on the table are from CC Jitters. (00:20:50)

Lone Gunmen - S1-E3

Oliver Queen: I'm having some trouble with my computer and they told me you were the person to come and see. I was at my coffeeshop surfing the web and I spilt a latte on it.
Felicity Smoak: Really?
Oliver Queen: Yeah.
Felicity Smoak: Because these look like bulletholes.
Oliver Queen: My coffeeshop is in a bad neighbourhood.

Guilty - S3-E6

Trivia: Oliver sticking an arrow in a boxing glove to knock out Ted without harming him is a nod to the comics, where a boxing glove arrow was quite common in his arsenal of trick arrows. (00:26:20)

Friso94

Elseworlds, Part 2 - S7-E9

Question: Why is Nora Fries in Arkham Asylum?

Rob245