Robbie Sinclair (full name Robert Mark Sinclair) is Earl and Fran Sinclair's teenage son on Dinosaurs. Although beginning the series at 14, Robbie celebrates his fifteenth birthday in the first season episode "The Howling". Intelligent but conflicted, Robbie is frequently torn between teenage hormones and general rebellion and more specific questioning of such institutions as Hurling Day or the general motives of WESAYSO and the Chief Elder.

Episodes about Robbie

• Episode 105: The Howling
• Episode 203: I Never Ate for My Father
• Episode 205: Endangered Species
• Episode 208: Career Opportunities
• Episode 210: How to Pick Up Girls
• Episode 215: Power Erupts
• Episode 307: Hungry for Love
• Episode 312: The Son Also Rises
• Episode 316: Steroids to Heaven
• Episode 302: Dirty Dancin'
• Episode 320: We Are Not Alone