Day analyzes a fairly basic Roach/Hydra/Corrupter ZvP, where Ret constantly trades to keep the Colossi number low. He opens the episode by introducing the concept of "relative timings" and continues to incorporate the idea throughout the show.
Part 1 – The early game – doing checks and preparations (early Roach warren)
Part 2 – Some of the mistakes that could be made in the 90sec window
Part 3 – The importance of attack timing; have a good reason for attacking