After a hiatus of almost 6 years and an extensive upgrade,
Tevatron, the world largest proton-antiproton collider, has resumed the
operation for the so called RUN II.  In this paper we give a brief overview
of many new features of the Tevatron complex and of the upgraded CDF
experiment, and show the presently achieved detector performances as well as
highlights of the RUN II physics program in the beauty and electroweak
sector.