CTV just announced the second season will have 18 episodes instead of 13 episodes. Thanks to ladyfunrock for the tip. Here is the official press release:

Toronto, ON (November 16, 2012) – CTV announced today it has upped the ante on its second season order for its hit Canadian drama series, SAVING HOPE, to even more episodes. The broadcaster has ordered an additional five hours from ICF Films/Entertainment One (eOne), bringing its second season commitment to 18 episodes in total. The most-watched drama series on Canadian television this summer, SAVING HOPE reigns as the most-watched Canadian drama of the 2011-12 broadcast year, with an impressive Season 1 average of 1.7 million viewers each week.

“Coming off SAVING HOPE’s incredible first season run, we recognized the opportunity to give fans more from the breakout series they’ve quickly come to love,” said Phil King, President, CTV Programming and Sports.” CTV is proud to make this increased investment in more Canadian programming and support the series through a commitment of additional episodes.”