flist question - in what episode did Cas tear down Sam's wall?

[growyourwings]

I'm talking with a friend who is through S6 and has not yet started S7 and my memory of both those seasons is not good.  I don't want to spoil her.    In what episode did Cas tear down Sam's wall?

I'm trying to find it and thought my flist may be able to answer faster.

Thanks!

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