  We review the main reasons pushing us beyond the SM and we argue in favor of
new physics at the electroweak scale (hence experimentally accessible at
present or near-future machines). We focus on the appealing possibility that
such new physics is given by a supersymmetric (SUSY) extension of the SM. We
discuss the minimal case, Constrained Minimal Supersymmetric SM, and more
general (maybe more natural) cases where some of the drastic assumptions of the
CMSSM are dropped. In particular, in these lectures we focus on CP violation
and its relation to flavor physics in the SUSY context. CP constrains the
low-energy SUSY extensions of the SM, but, at the same time, it provides new
powerful tool for indirect SUSY searches.
