I can't see Gina being up to be honest and if Charlie, the twins or Sophie are up then Dexter will survive.
Dex is 10/3 (the best odds he's ever had!) to win now compared to the twins at 40/1, Charlie and Sophie both at 50/1 in joint last place !!!!
It's never looked so good for Dexter! Unless he does something crazily bad this week or it's just him against Sam and Gina (extreeeeemely unlikely!) he's going nowhere and he'll be in the final.