A cameo is a brief appearance of a character in an episode. Typically, only one or two lines are said.

Cameo type	Definition	Template
Cameo	Character appears on screen briefly and says their line(s).	{{Cameo}}
Non-speaking cameo	Character appears on screen, but does not have any lines.	{{Nonspeak cameo}}
Speaking cameo	Character's voice is heard but they do not appear on screen.	{{Speak cameo}}
Mentioned only	The character is mentioned in the episode, but not seen or heard.	{{Mentioned}}
Pictured only	The character only appears in the episode by way of a picture.	{{Pictured}}