Well kids, you’re in for a surprise or two. We now have an official premiere date for the second half of season 4 of Warehouse 13, and it’s April 29, two weeks after the series premiere of Defiance. So right off the bat we have a surprise; two weeks after the Defiance premiere, not the same day, not a week later.

But guess why it can’t be the same day as the two hour premiere of Defiance? Because, according to EW, Warehouse 13 will be airing at 10/9c. Those of you who enjoyed watching the show with your kids hopefully won’t be too thrown by this, as even when it was on at 9/8c that was pretty late for the east and west coasters and you probably DVR’d it anyway. Still, this is a big move for the show, and it will be interesting to see how it does in the new time slot.

Currently Lost Girl is airing in that 10/9c slot, and if it plays all the rest of the episodes of Season 3 in order, it would have aired the season finale on April 15, but since the Defiance series premiere is a two-hour one and airs on the 15th, presumably the Lost Girl season finale will air the following week, which explains the delay in the premiere for Warehouse 13. The air dates for Lost Girl have not yet been confirmed, so don’t mark up your viewing calendar quite yet.

Here’s some great news that is confirmed, however – we’ll be seeing a return of guest stars Jaime Murray (Defiance) and Kate Mulgrew (Star Trek: Voyager) as H.G. Wells and agent Pete Lattimer’s mother/Warehouse Regent Jane Lattimer, respectively, during the second half of Season 4.

To help keep it all straight, the SciFiMafia.com Winter and Spring Primetime TV Schedule has been updated again. Yes, Revolution, Grimm, and Doctor Who dates are all there. And in case you missed it, make sure to check out the pictures from SciFiMafia.com’s Warehouse 13 Season 4 set and cast visit here.

The midseason premiere of Warehouse 13, starring Joanne Kelly, Eddie McClintock, Saul Rubinek, Allison Scagliotti, and Aaron Ashmore, airs Monday, April 29 at 10/9c on Syfy.