The "Collision Course" that SHIELD began last week gets closer to impact. Deke tries desperately to stop the atomic bomb from being detonated before the runaway truck hits the Shrike tower. Fitz and Simmons come to the startling conclusion that Izel has something dangerous planned. Sarge begins his takeover of the Zephyr with the help of Jaco and Pax. But of course our heroes are resilient. Yo-Yo helps Mack get free, takes out Pax, and even begins to convince Jaco that Sarge may not be taking the right path. Jay and Josh argue whether to cut the red wire or the blue wire on this week's Agents of S.H.I.E.L.D.: Case Files.