Re: Season 5
If they do that, the series is over. They can't go without Fiona and Sam is half the reason I watch this show. The only one "expendable" is Jesse. But it won't come to that anytime soon, the series is becoming too repetitive to engage in big changes. They still live in the same house as episode 1, drive the same car, have the same friends, etc. Nothing's going to change.
That's something I love about Dexter: a lot of stuff and people are collateral.