Justin Chambers brings his A game on Thursday's Grey’s Anatomy Season 10 Episode 12, the midseason finale of the long-running medical drama on ABC.

His character, Dr. Alex Karev, puts up a convincing, macho facade.

Any fan of the series, even casual ones, know that much. But once you get beneath that, he's a much more complex character than he lets on. Much more.

When his father showed up, this became more apparent than ever.

In an emotional sneak peek from "Get Up, Stand Up," Alex finally sits down with his dad and even starts reminiscing with him about when he was a kid.

Things promptly take a darker turn, however. See why right here ...

Should be interesting to see where this goes for him, that's for sure.

In another clip from tonight, we see April frantically on the hunt for bridesmaids and running into Jackson, who asks whether he is welcome at the wedding.

What does April say to that? And how does he respond? Find out:

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Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.