Jose Chung speaks to FBI agents before writing "From Outer Space" about an alien abduction on this show
... 
Scully: Yes, and I feel that I must apologize for his refusal to speak with you, ... 
Scully: What made you decide to write a book on an alien abduction, if you're ..... 
Chung: ...sat down, ordered sweet potato pie, identified himself as FBI agent 
Mulder.