Lost Girl 4x11 "End Of A Line": Airs Sunday, January 26th at 10pm ET/PT on Showcase. After Bo narrowly escapes an attack by a vengeful Fae, the team tracks down who sent it, only to make Bo doubt her feelings for someone she loves. Also, a visit surprises Kenzi.
(click to enlarge, also Dyson/Kris' hair is killing me in his solo pic)
In addition, a title and date has been set for 4.12 - I assume it is legit:
S04E12 - It Begins 9th Feb 2014 (NOTE: the show will be skipping a week again.)
SOURCES: 1 | 2 | 3
Since they are skipping a week and Paul Amos (who plays Vex) has said "stiff drinks mandatory" and "this one is quite something" about this episode, I'd get prepared for possibly another cliffhanger and/or rage-off about the storyline (if you even care any more). I feel zen about it though. Like a randomly dead butterfly that has come back to life. ;-P