Col. O'Neill and Teal'c in “Unfinished Business”

[In Teal'c's body] Teal'c, what are you doing?

[In Jack's body] If I am to remain in this body, I must shave my head

[In Teal'c's body] You're making a joke, right?

[In Jack's body] I am not joking.

[In Teal'c's body] Teal'c, you will not shave my head!

[In Jack's body] It is presently my head, O'Neill.

[In Teal'c's body] Teal'c, this is only temporary!

[In Jack's body] And if it is not?

[In Teal'c's body] Just give them a chance to find Daniel, okay? Teal'c, I'm going to see General Hammond. Promise me you won't touch the head until I get back.