  We present the two-loop mixed strong-electroweak virtual corrections to the
charged current Drell-Yan process. The final-state collinear singularities are
regularised by the lepton mass. The evaluation of all the relevant Feynman
integrals, including those with up to two different internal massive lines, has
been worked out relying on semi-analytical techniques, using complex-valued
masses. We can provide, at any arbitrary phase-space point, the solution as a
power series in the $W$-boson mass, around a reference value. Starting from
these expansions, we can prepare a numerical grid for any value of the
$W$-boson mass within their radius of convergence in a negligible amount of
time.
