suspicion that he might be Christy Sullivan's murderer gnaws heavily on her and she agrees to set her father up, arranging a meeting at an outdoor café where the police can take him into custody. Frank guarantees Whitney's safety, but Burton learns of the plan through the wiretap, and both Collin and McCarty – a hitman hired by a vengeful Sullivan – prepare to kill Whitney. The two snipers, each unaware of the other, try to shoot Whitney when he meets with Kate. Whitney escapes disguised as a police officer. Whitney later explains to Kate exactly how Christy was killed and by whom. Whitney tricks Russell into wearing Christy's diamond necklace during a White House event. Suspecting that Kate must know the truth, Richmond decides she must be eliminated. When Whitney learns from Frank that the Secret Service has taken over surveillance of Kate, he races back to Washington, D.C. to protect her. Collins then begins ramming Kate's car near a cliff edge, Whitney arrives and pins Collin's vehicle but not before Kate's car falls off a cliff, but she survives. Collin tries again to kill Kate at the hospital with a poison-filled syringe, but Whitney subdues him with a syringe of his own. Collin pleads for mercy, but Whitney delivers a fatal dose. Whitney replaces Sullivan's chauffeur and tells Sullivan what truly happened the night his wife was killed. Sullivan is unconvinced until Whitney explains how Richmond lied in his speech about Christy's excuse for staying home that night, which he could only have learned from her. He gives Sullivan the letter opener with Richmond's blood and fingerprints and tells him that he has since returned the stolen items. Whitney drops Sullivan off outside the White House. Sullivan passes through security with the letter opener and enters the Oval Office. Meanwhile, alerted by Whitney that his phone has been bugged, Frank discovers that a remorseful Burton has committed suicide and uses the evidence Burton left behind to arrest Russell. On television, the next morning comes the shocking news from Sullivan that Richmond committed suicide by stabbing himself to death. Though not confirmed, it is suggested that Richmond died by Sullivan's hand or Richmond did in fact commit suicide to avoid punishment for his crimes. Whitney is satisfied that justice has prevailed, and happy his daughter is safe and part of his life again. At the hospital, Whitney watches over