Having watched the whole of Season 1 of DC's Legends of Tomorrow, I'm not entirely sure where the driehoek comes in and why the writers placed so much emphasis on it.

Kendra and Carter have known each other and loved one another for the last 4000 years and 206/207 lifetimes. This seems, to me at least, that this relationship has meer importance to the toon and to both characters. As everyone who either watches the Flash of Arrow knows, the crossover episodes Legends of Today and Legends of Yesterday implies that Carter remembers his past lifetimes, including his first as Prince Khufu - which...