Also worthy of mention is the swank, jazzy, uptempo version used in "The Perfect Mark" when Price gets the baseball from the soda vendor.
Out of all Reese's Pieces, Knock Knock, featured during the scenes of action and vehicular mayhem, is the most awesome. Carter gets her own version of "Knock Knock" when committing Reese-style vehicular mayhem in "Endgame".
"I Know You Are But What Am I?" by Mogwai, hauntingly beautiful at the end of "Foe".
The chillingly ominous "If I Had a Heart" by Fever Ray, used in "Blue Code".
"No Good Deed" made good use of David Bowie's "I'm Afraid of Americans."
"It Serves You Right to Suffer" by John Lee Hooker, in "High Road", very fitting for the sequence where Graham, fearing for his family's safety, leaves his wife a note confessing his hidden past and slips out to join the gang of robbers.
"Young Men Dead" by The Black Angels, used as the music bed for the 2014 San Diego Comic Con teaser reel. It returns in the episode 'Prophets' when Root engages in a massive gunfight with Mantine Rousseau across a hotel lobby.
Jetta's haunting cover of "I'd Love to Change the World" (also seen in the trailer), used as the team gets back on track in the end of the first episode, "Panopticon". It reflects the Season 4 Arc Words: "The world has changed."