He did his best to keep his face a solemn, emotionless mask.

She looked at one of them, then the other, her face an emotionless mask.

Now, they were emotionless masks hiding whatever it was that floated in his head.

I frowned, trying to pierce the man's emotionless mask by the sheer intensity of my own feelings.

It made him want to reach out and shake her, if only to crack that emotionless mask she was hiding behind.

She stared at me, her face suddenly an emotionless mask.

Jessie saw a change come over the face: it was no longer a blank, emotionless mask.

Kirk glanced at Spock, who said nothing and kept his face its normal emotionless mask.

And for the first time since he had known her, the emotionless mask dropped from Penelope's face.

She looked up at him, and for just a moment the emotionless, alien mask disappeared.