Apparently "series" is the plural and there is no singular. Learn something new...

• Bleach, Season 1
• Aeon Flux (full and short episodes, revisited)
• Dexter, Season 1
• Dexter, Season 2
• Dexter, Season 3
• Dexter, Season 4
• Bleach, Season 2
• Afro Samurai
• True Blood, Season 1
• True Blood, Season 2
• True Blood, Season 3
• Cowboy Bebop (revisited)
• Dexter, Season 5