Speaking in a Q&A hosted by Deadline earlier this month, Bateman, Linney, McTeer, and showrunner Chris Mundy were asked about that final scene.
And Bateman detailed how the opening moments of season four will pick up exactly after Helen’s murder.
“We actually start the next season – the first episode is Laura and I looking in the mirror, just after that moment,” Bateman said.
“(Us) cleaning Janet out of our hair [laughs]. So it’s, you know, 10 minutes later we kind of pick up from it.”
source: express.co.uk