B&W movie with mask on bedroom wall

I remember seeing a black and white movie in the 50’s where a man would go to sleep in a bedroom that had a mask on the wall. After he was a sleep the wall with the mask would slide open and a woman would come in and (I think) give him an injection of truth serum. What is the name of this movie and who was in it?

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  1. Still looking……
    I remember seeing a black and white movie in the 50’s where a man would go to sleep in a bedroom that had a mask on the wall. After he was a sleep the wall with the mask would slide open and a woman would come in and (I think) give him an injection of truth serum. What is the name of this movie and who was in it?

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