Promise

The entire episode is a summary of Cal's life with Reiji with a few added scenes. While Reiji's apartment was bombed by Inferno's attack, Cal was actually out shopping in a store. For a few days, Cal remained in the apartment ruins waiting for Reiji to return but he never showed up again, since he's now on the run with Elen. Scythe Master appears to Cal and encourages her false belief that Reiji has abandoned her and broken his promise. Meanwhile, Reiji and Elen have headed to the outskirts of Mexico.

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S01E20 - Homeland