During the teaser check out the lips of the guy claiming to be Tito Osmond, his lips don't match his dialogue.
The one, and only, kiss that "Tito Osmond" gives Val is not the same one that is shown on the cover of the "National Inquisitor" that everyone at V.I.P. is seen reading.
After Kay finishes talking to Ian Ziering on the phone Tasha asks her what he wanted and Kay says: "Oh. Right. He says he's afraid to go home, wants us to meet him in Palisades Park. Needs our help, he's pretty sure his life is in danger." If you listen carefully however Ian says that he needs a bodyguard, to which Kay replies: "That sounds awful.", and he asks if they can meet tomorrow. No mention is made of his being afraid to go home, his life being in danger, or even a location for their meeting.
If you look carefully when Ian Ziering pushes the guy off his bike you'll notice that it's no longer Ian Ziering.
The mask that was left behind by Ian Ziering's impersonator looks nothing like Ian Ziering.
When Quick and Nikki go to see their street contacts they go in Nikki's car. From a far away view you can see a white woman in the passenger seat, but when they close-up on the vehicle you can now see Quick in the passenger seat.
When "Quick" comes out of the restaurant Nikki's car is facing the opposite direction it was originally facing when they first arrived.
When "Quick" comes out of the restaurant you can see a sun painted on the wall next to Nikki's car. But when the real Quick comes out, you can now see that the sun has a face painted on it, along with something written above it.
When the real Quick comes out of the restaurant he notices that Nikki is gone, which means that the Quick that left with Nikki was the impersonator. But how did the impersonator know exactly where Quick was going to be, what he would be wearing(he could of changed clothes), and that he'd have a suitcase with money inside with him?
When the fake Quick high fives Nikki she smells her hand and realizes that he's not wearing any cologne, like the real Quick always does. She had been sensing that something was off, but she wasn't sure what it was until she smelled her hand, and realized that he wasn't wearing any cologne. She should of been able to realize that he wasn't wearing any cologne as soon as he got in the car with her.
When Nikki finds the mask that The Owl was wearing to impersonate Quick you can see that the mask has longer hair than Quick does.
When The Owl grabs Nikki from behind he's already out of Quick's clothes and into his own. How did he get changed so fast and where was he hiding his own clothes?
How does The Owl get to Val's penthouse apartment so fast? One minute he's turning off the power from the basement and the next he's in her apartment. Not even an elevator is that fast.