Cook bacon until crispy over medium high heat, drain and set aside, reserving 2 tablespoons bacon grease.
Set the pasta to boil according to the package's directions.
Whisk cream, Parmesan, egg yolks, and worcestershire sauce in a medium sized bowl. Whisk in the warm bacon drippings that had previously been set aside. Whisk until blended and set aside.
Drain pasta and return to pot. Do not rinse! The heat from the pasta will cook the egg yolks in the cheese mixture. Carefully add cream mixture and toss until pasta is well coated. Add bacon, and pepper to taste. Serve.