Lost Girl 4.06 - 'Of All The Gin Joints' (Sunday, Dec. 15th): Bo fights for the freedom of a talented opera singer, whose voice could be the key to unlocking the answers she seeks. Meanwhile, Kenzi is threatened by someone from Hale's past. (Guest starring: Lara Jean Chorostecki)
This promo is also on SpoilerTV, if it's blocked in your region.
(click to enlarge)
Lost Girl Episode 4.08 - "Groundhog Fae" (First Aired: December 29, 2013)
Bo's friends are having to much fun celebrating the Yule to realize that she has gone missing. But when the night starts repeating itself, Bo makes it her mission to stop it. Meanwhile, Lauren and Dyson disagree over a mysterious package addressed to Bo.
SOURCES: 1 | 2 | 3 | 4
It took me well over a minute to realize who the guest star was (Showcase doesn't really advertise all of the guest stars, AFAIK)...FREDDIE!!!11!!! (Enjoy your surprise? holiday "present," you Hannibal fans.) This is for the Canadian premiere / airing of the episode - it won't be on SyFy in the US until February or so.