When the client is initially doubtful of Michael Westen and his team's abilities, he sardonically asks, "So, what? You just snap your fingers and the dealers disappear?" Michael responds with, "Well, it's worked before." This is a subtle reference to Friendly Fire (2010) where Michael is up against another gang and his alter-ego has things dramatically blow up around him and his opponents whenever he snaps his fingers.
The tape cartridge Michael found and is trying to read (which he incorrectly calls a "tape drive") is a digital linear tape (DLT). DLT was introduced in 1984 and continued through several generations of technology. New development ended in 2007.
When David is trying to sneak out of the house, he mispronounces a medication called neurontin as 'neurotonin', even though the subtitles spell it correctly. Neurontin, trade name Gabapentin, is a medication used to treat epilepsy, depression and, more commonly, nerve pain.
The first name of Michael Westen's cover ID is "Kyle". Jeffrey Donovan (Michael Westen) played a character named "Kyle" on The Pretender (1996).