| Quote | 
  Episode | 
   | Barclay :  | "Being afraid all the time, of forgetting somebody's name, not knowing what to do with your hands. I mean, I'm the guy who writes down things to remember to say when there's a party. And then when he finally get there, he winds up alone in the corner trying to look comfortable examining a potted plant."  |  
   | Geordi :  | "You're just shy, Barclay!"  |  
   | Barclay :  | "Just shy. Sounds like nothing serious, doesn't it? You can't know."  |  
 
 | TNG : Hollow Pursuits | 
| Barclay :  | "Young children are sometimes frightened of the world. That doesn't mean that their parents should let them stay in their cribs."  |   | to Troi |  
  | TNG : The N'th Degree | 
   | Barclay :  | "I know, it sounds crazy, but…"  |  
   | Troi :  | "It's not crazy at all. You are being taken apart molecule by molecule."  |  
 
 | TNG : Realm of Fear | 
   | Barclay :  | "Chief."  |  
   | O'Brien :  | "Lieutenant. Glad you could make it. You know, I think this is the first time we've ever spoken outside of the transporter room."  |  
   | Barclay :  | "Well, to be honest, I've always avoided you."  |  
   | O'Brien :  | "Why?"  |  
   | Barclay :  | "Because you run the transporters, and I hate the transporters. At least, I used to."  |  
 
 | TNG : Realm of Fear | 
   | Crusher :  | "Reg, you don't have Terellian Death Syndrome!"  |  
   | Barclay :  | "Are you… you're sure?"  |  
   | Crusher :  | "I'm sure."  |  
 
 | TNG : Genesis | 
 | TNG : Genesis | 
   | Barclay :  | "Was everything that happened between us a lie?"  |  
   | Leosa :  | "Not everything. Just the parts where I expressed affection for you."  |  
 
 | VOY : Inside Man |