"NVIDIA's Chimera architecture with our AR0833 sensor delivers mobile customers an amazing photo and video experience, " said John Gerard, Senior Director of Mobile Products at Aptina.

ENGADGET: NVIDIA intros Tegra 4i with built-in LTE, details Chimera camera tech with HDR

The ancient Persian king Xerxes noted that eating the leaves improved his soldiers' vigor, while the Elizabethan herbalist John Gerard prescribed the plant for restoring the bloom to ladies' cheeks.

WSJ: Watercress, Springtime's Superfood

And since we already know the ending, attempts to build tension flounder - despite an almost demonic turn from Gerard McSorley as Veronica's chief adversary John Gilligan.

BBC: Hollywood simplifies Guerin's story