On the AMC blog, Boyd revealed that events will begin to take their toll on Lori Grimes (Sarah Wayne Callies).
"She's kept her s**t together through Rick (Andrew Lincoln) getting wounded and all that stuff, but she's starting to come apart a little bit," he said.
Boyd, who worked as a cinematographer on the AMC drama's first season, will direct the seventh episode of the new season.
"By the end of [that] episode [Lori] and Rick put it all out there," he said.
Boyd also revealed that episode seven will see Andrea (Laurie Holden) take on a more action-oriented role.
"Episode 207 is cool in that we see that Andrea, this girl can shoot, man," he hinted.
Frank Darabont recently stepped down as showrunner on The Walking Dead, with reports suggesting that he was fired after objecting to budget cuts.
Cutbacks to the show's budget are believed to be a result of the new $10 million (£6.1m)-per-season budget allocated to AMC's Mad Men.
The Walking Dead will return to AMC in the US and FX in the UK in October.
> Walking Dead gets pre-zombie flashback
Watch a trailer for season two of The Walking Dead below: