[Martin enters the apartment as Niles' cellphone is ringing]
Martin: [answering the phone] Hello?
Frasier: [on his phone] Yes, hello, is Niles Crane there, please?
Martin: [on the phone] Uh, I don't know, I just got here. Let me go check.
[Martin goes into the kitchen]
Martin: Frasier, have you seen Niles?
Frasier: I'm just trying to reach him, Dad.
Martin: Oh, okay.
[Martin returns to the living room]
Martin: [on the phone] No, I'm sorry, he's not here. But I'll write your name down and give it to him. Uh, wait a minute, I've gotta find a pen.
[Martin goes to the kitchen again]
Martin: Frasier, have you seen my-
Frasier: Dad, please, I'm on the phone.
Martin: Well, I'm sorry, I was just looking for a pen! Forget it.
[Martin returns to the living room. Frasier follows him]
Martin: [on the phone] Hello? Listen, could you maybe call back in an hour?
Frasier: Dad?
Martin: Would you mind, please? I'm on the phone!
Frasier: [on his phone] Dad, it's me.
Martin: Frasier, why did you call from the kitchen? You could have just walked in here.
Frasier: Just hang up the phone.