AVClub: Sometimes, execution is everything. In athletic competition, in science, in any number of aspects of life, it’s all about timing, strategy, and pulling off planned actions in exactly the manner intended. “Spacetime,” tonight’s installment of S.H.I.E.L.D., makes for an excellent example of the value of executing a plan properly, and not just because the narrative is explicitly about planning the ideal action. No, it’s also because sometimes you can plan and prepare and lay the groundwork for everything you want to do, and it still doesn’t work. You can think you see everything that’s going to happen, until suddenly, you realize there’s a one-way mirror, and it changes everything. This episode was executed very well, making sure every image paid off and every beat landed, and yet it didn’t quite live up to its potential.