There is no way to watch "The Walking Dead" online for free as of June 2015. It is only available on AMC's website for subscribers, or for a small amount of money per episode via certain streaming platforms.
"The Walking Dead" is available on a number of different platforms for a nominal price. As of June 2015, the first four seasons of the show are available for streaming on Netflix. Payment plans for Netflix start at $7.99 per month and include "The Walking Dead" and numerous other television shows and feature-length films. "The Walking Dead" is also available on Sling TV, a streaming service run by Dish Network. For $20 a month, customers gain access to AMC, including "The Walking Dead," and other channels, such as ESPN, TNT, TBS and Cartoon Network.
Individual episodes of "The Walking Dead" are available on iTunes and Amazon for $1.99, with the option to pay $2.99 to watch the episodes in high definition. Amazon also has the option to purchase full seasons for $26.99 each, or $29.99 for full seasons in high definition. Individual episodes of "The Walking Dead" can also be purchased for $1.99 from both Google Play and VUDU, two other online streaming sources. Episodes can also be purchased for $1.99 via the PS Store, which runs on Sony's PlayStation 3 and PlayStation 4 home consoles.