Quid Pro Quo

"Quid Pro Quo" is the tenth episode of Constantine. It aired on January 23, 2014.

Synopsis
When Chas' daughter, Geraldine, falls into a mysterious coma, the team must negotiate for her soul with a devilish mastermind named Felix Faust.

Behind the scenes
The Latin "quid pro quo" is often rendered into English as "tit for tat", although the latter has a greater sense of retribution, whereas the Latin merely declares the exchange.