Arratia
Arratia is the last name of the actor who portrayed Ensign Alfonse Pacelli in twenty episodes of  between the second and the seventh season. He received no credit for his appearances and was identified by the call sheets of the fifth season.

According to the call sheets, Arratia was also scheduled to film Ten Forward scenes for the episode  and corridor scenes for the episode  but was not part of the final episodes.

Appearances 
 
  (Season 2)
 
 
  (Season 3)
 
 
 
 
  (Season 4)
 
 
  (Season 5)
 
 
  (Season 6)
 
  (Season 7)
 
 
 

Performers
TNG performers