That's David Strathairn in the background. He plays a patient on the episode "Lockdown."
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House gets trapped in a patient's room during the episode "Lockdown." The patient is played by David Strathairn.
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David Strathairn guest stars on the episode "Lockdown." It's directed by Hugh Laurie.
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Chase has a lot to think about during the episode "Lockdown." Cameron returns!
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Yup, that's Cameron. She's back at the hospital on the episode "Lockdown."
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House Season 6 Episode 16 Quotes

Thirteen: What now?
Wilson: Truth or dare?
Thirteen: No! You don't wanna mess with me.

We are on lockdown. No one moves until we find that baby.

Cuddy