After taking a call, Det. Ryan states, "our perps were wearing gloves". However, in the earlier scene, the gunman who enters the morgue vehicle is clearly not wearing gloves and opens the door bare handed.
Castle inexplicably describes his winning poker hand, a straight (65432), as an "inside straight". An inside straight is a straight with a card missing from inside (rather than at an end of) the sequence, such as 987_5 or 87_54 or 7_543 (the fifth card being other than the necessary 6) -- a worthless hand.