Let's face it: Downton Abbey Season 4 hasn't exactly been uplifting.

Episodes to date have dealt with such topics as rape and death, with Lady Mary still unable to move on from losing Matthew on the Season 3 finale.

But she'll sit with Tom and Isobel on Sunday's new episode and be involved in what may be our favorite scene to date, as these three sit around and reflect on their late loved ones.

What special memories they provided, even if they are no longer around.

"Aren't we the lucky ones?" says Isobel.

Watch Downton Abbey online to catch up and check out the sneak peek now:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.