What Leno leaves behind . Jimmy Fallon is preparing to pass the ` ` Tonight '' February 3 torch to Jay Leno . CNN will be a guest on ` ` Tonight Show '' . That will launch Leno 's farewell week . Leno 's last night on `` Tonight '' will be February 6 .
Jimmy Fallon is preparing to pass the ` ` Tonight '' February 3 torch to Jay Leno . CNN will be a guest on ` ` Tonight Show '' . That will launch Leno 's farewell week . Leno 's last night on `` Tonight '' will be February 6 .