Reunion specials are television programs that bring back the original cast of a popular show to celebrate its legacy. These specials often include interviews, behind-the-scenes footage, and discussions about memorable moments from the series. They provide fans with a nostalgic look at their favorite characters and storylines. Typically aired years after the show's conclusion, reunion specials can reignite interest in the series and introduce it to new audiences. Examples include the Friends reunion special and the Harry Potter 20th Anniversary: Return to Hogwarts, which both featured cast reflections and shared experiences from their time on set.