Walmart discounts Person of Interest on Blu-ray, as listed below. Opt for in-store pickup to avoid the $4.97 shipping charge. The deals:

• Person of Interest: The Complete First Season on Blu-ray Disc for $12.96 (low by $15)
• Person of Interest: The Complete Second Season on Blu-ray Disc for $12.96 (low by $12)
• Person of Interest: The Complete Third Season on Blu-ray Disc for $12.96 (low by $6)
• Person Of Interest: The Complete Fourth Season on Blu-ray / Digital HD for $16.96 (pictured, same at Amazon, low by $14)