Grey's Anatomy Season 9 hasn't been easy on the docs at Seattle Grace-Mercy West, and it looks like the going continues to get tough — in fact, one normally stoic doc breaks down in tears!

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Some eagle-eyed fans noticed that in the winter promo, there is a brief shot of what looks like Jo (Camilla Luddington) and Alex (Justin Chambers) crying.

A fan tweeted at Camilla asking what the deal with that shot is, and she replied, "Oh no! Yep Alex and Jo are both crying.. :("

When another fan pointed out that Alex rarely cries, Camilla said, "well he crying again :("

Hmmm ... What do you think brings Alex to tears? He and Jo are both all dressed up and it looks like they could be at Bailey's (Chandra Wilson) non-wedding, so maybe it's receiving the news of Adele's illness — or death. On the other hand, Jo seems to be completely breaking down, and as far as we know she doesn't know Adele, so maybe it's something else.

Share your guess below!

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Source: @camilluddington, @camilluddington

Catch the next new episode of Grey’s Anatomy on Thursday, January 10, 2013, at 9 p.m. ET/PT on ABC.