Conan O’Brien reunited with an old friend on last night’s Tonight Show, perhaps for the last time, depending on how things go at the NBC negotiations. Both David Letterman and John Oliver also discussed Conan’s intellectual property on their respective shows, while Stephen Colbert provided an unorthodox solution to NBC’s Dick Ebersol. Finally, Jay Leno proved that he pulls no punches in his reignited rivalry with Letterman. Watch our compilation to see what you missed.