I believe Dexter is unquestionably the best show on television. My one caveat on recommendation is if you have trouble with having a serial killer as the protagonist of a show. The first two seasons are currently available on instant play.

WATCH: Dexter season 1 (2006) – “Playing a sympathetic serial killer might sound like a stretch, but former “Six Feet Under” star Michael C. Hall pulls it off in this macabre drama about a likable forensics expert who channels his violent tendencies into knocking off miscreants. Dexter Morgan (Hall) seems so harmless, in fact, that neither his girlfriend (Julie Benz) nor his cop sister (Jennifer Carpenter) suspect the true nature of his extracurricular activities.”
At first I thought all of the supporting cast’s performances were spot on but that Michael C. Hall’s performance lacked something – that it was a bit flat. A little later it hit me, his performance was brilliant. He plays a man who plays at having emotions to blend in. The South Florida scenery is wonderful (though I probably overvalue it as I grew up in Miami and miss it though certainly not the omnipresent heat). The writing is wonderful and the cast of characters is very complex – many besides Dexter having psychological issues of their own. Although individual episodes are well-plotted, the meat of the show comes from the wonderful character interactions and the overall season story.

WATCH: Dexter season 2 (2007) – “Mild-mannered forensics expert Dexter Morgan (Michael C. Hall, in an Emmy-nominated turn) continues his double life as a Miami serial killer in the sophomore season of Showtime’s dark drama. Keith Carradine joins the cast as FBI agent Frank Lundy, whose investigation may expose Dexter’s dark secret. Call him crazy, but there’s method in Dexter’s madness as more of Miami’s worst meet their demises.”
Well everything I said about season one applies to season two as well. The only difference is the addition of two new wonderful characters, Jaime Murray as Lila and Keith Carradine as Special Agent Frank Lundy.