Labyrinth May 22 & 23, 8 p.m., the CW.

Labyrinth is an odd fit for the CW: The two-part, four-hour miniseries, based on the popular novel by Kate Mosse, seems like it would be more at home on Syfy or TNT or even Starz, which aired the similar The Pillars of the Earth. An international co-production, Labyrinth takes place in France in two different eras, as women in both 1209 and 2012 are drawn into the search for the Holy Grail.

With its emphasis on religious conspiracies and alternate history, Labyrinth owes more than a little to The Da Vinci Code, and it’s similarly pulpy and overstated. The dual structure allows for twice the histrionics, and stars Vanessa Kirby (in the present) and Jessica Brown-Findlay (in the past) deliver plenty of it. After two tedious installments, the vast conspiracy remains frustratingly vague, and the history lesson about the massacre of the Cathars could be learned just as easily (and more quickly) from Wikipedia.