I think Spydad Jack is just up to his usual tricks. And yes, sometimes the "making him look evil" thing when he's not really evil does get old, but here's what I'm thinking...
I don't have much of a theory regarding Jack, and I'm pretty sure he isn't in cahoots with Sloane in the literal sense, although it may look like it from the outside.
Was anyone else thinking it was a little too convenient that Anna Espinosa suddenly showed up at Syd and Nadia's lunch just then? And Sloane was kind of lurking around (the office) all creepy like... I'm thinking Sloane tipped Anna off. Maybe the real purpose of the kidnapping was to get Nadia marked with the Ramaldi symbol - the rest being a charade to make it look like Syd was doing something for Anna in exchange for Nadia's safe return.
Sloane seemed so certain that Anna wouldn't hurt Nadia. How did he know this? I know this may sound far fetched, but maybe Sloane was behind the whole thing. I still haven't figured out what any of it has to do with the putty in the tin can... but in retrospect, Anna could have just as easily gotten the putty herself, why did she need Syd? Even though I was on the edge of my seat the whole time, I was still kind of left with the feeling that maybe the entire thing was just a charade orchestrated by Sloane to camouflage whatever he is really up to.
How's that for spin? goodwink.gif