In chuck vs the frosted tips Morgan does the tranquiliser darts in the same fashion neo does in the matrix. The actress who plays verbanski played trinity in the matrix
Chuck's father (played by Quantum Leap's Scott Bakula) says his trademark line from the time travelling show, when meeting Chuck and Sarah for the first time. "Oh Boy!"
After appearing in the vast majority of episodes from seasons 1-3, Bonita Friedericy (General Beckman) was finally made a regular cast member in season 4.