Dexter's inability to provide a halo to the Showtime network is mostly due to the sharp drop off in quality in the middle of its run and Showtime's unwillingnes

Dexter's inability to provide a halo to the Showtime network is mostly due to the sharp drop off in quality in the middle of its run and Showtime's unwillingness to kill it there after. Homeland might be able to achieve what Dexter failed to, but that'll be contingent on how the fix the serious missteps they made last season.