THURSDAY, SEPTEMBER 2

"THE VAMPIRE DIARIES" - (8:00-9:00 p.m. ET)

"Founder's Day" (TV-14, LV) (HDTV)

FOUNDER'S DAY TURNS DEADLY - Founder's Day has finally arrived, and everyone is busy with last-minute preparations for floats and fireworks. Stefan (Paul Wesley) is uncomfortable with Damon's (Ian Somerhalder) new attitude toward Elena (Nina Dobrev), but Elena is more concerned about repairing her relationship with Jeremy (Steven R. McQueen). Jeremy is worried about Anna (guest star Malese Jow), but not sure he's on board with her latest plan for the future. While Caroline (Candice Accola) is enjoying her day as Queen of the celebration, she also tries to help Matt (Zach Roerig) and Tyler (Michael Trevino) get their friendship back on track. Finally, although Damon and Alaric (Matt Davis) do their best to stop him, Johnathan Gilbert (guest star David Anders) sets a plan in motion that brings Founder's Day to an end amid chaos, destruction and death. Sara Canning and Katerina Graham also star. Marcos Siega directed the episode written by Bryan Oh & Andrew Chambliss (#121).