Smallville, Season 2

Jonathan:
Look, I need you to promise me that you won't tell anybody about this, and I mean anybody.

Helen:
Mr. Kent, I take my doctor/patient confidentiality very seriously. But Clark needs proper care.

Jonathan:
Doctor, Clark isn't exactly what you'd call a normal boy.

Helen:
I need to get a blood sample.

Jonathan:
Listen, Dr. Bryce, you can't do that.

Helen:
Is this some sort of religious thing?

Jonathan:
No, I mean literally, you can't do that.