When Kensi and Deeks are talking to Sen. Osborne, Osborne puts a sticker on Deeks' shirt. It is crooked. When they walk away and the camera angle changes, the sticker is now straight.
In 25th minute Deeks wears a wedding ring on his left hand. As we all know Deeks isn't married and he isn't undercover in this scene, the wedding ring belongs to Eric Christian Olsen who portrays Deeks.
While Hetty and Granger talk about the case and politics, Linda Hunt says "modern polistics" instead of "modern politics"