“Walker Withdrawal” is about to end in a big way for TWD fans, as now they can expect inoculation in the form of a 90-minute long episode. Episode 4 of season 6, “Here’s Not Here,” (written by Scott M. Gimple and directed by Stephen Williams) will be an hour and a half long, dubbed as The Walking Dead Mega Sunday.
Scott Gimple spoke at San Diego Comic Con this year about a certain special flashback scene. This may just be it.

The Walking Dead airs Sundays at 9 PM ET on AMC