Good news ahead for Luke Callaghan's followers (Eric Johnson) on ABC's Rookie Blue!
If you're wondering if the young gumshoe will return on the show's current fourth season, the answer is YES! I just learned that part of his gig includes an intense mid-season case featuring one of the show's past (and most dangerous) villains.
Source: TV Line
Check out this Rookie Blue season 4 "Change or Die" featurette released by ABC below: