Michael Emerson, Brett Cullen, Kevin Chapman, and Mark Pellegrino previously worked together in J.J. Abrams' hit series "Lost".
The nail gun used towards the end is not battery powered but actually a compressed air-powered DeWalt nailer that can be jerry-rigged to fire without the contact safety mechanism activated.
Towards the beginning of the episode, you see a car with the panel stating, "Cyber Wingman", a good description of Finchs relationship to Reese.