Season 7, Episode 12 - "Flower Child"
A spore from space falls to earth in an elderly woman's roof garden. The flower that sprouts sends out tendrils that ensnare the old woman. Meanwhile, Mia and Chris, a newly engaged couple, move into an apartment down the hall. The gardener's apartment is now inhabited by Violet, an enigmatic and overpoweringly seductive woman, challenges the young couple's ideas of commitment and monogamy. When she succeeds in nudging Chris over the line, the consequences of infidelity turn out to have serious consequences, not just for Mia and Chris, but for the world at large.
