  We present solutions for the late time evolution of cosmological tensor and
scalar perturbations in a single-Randall-Sundrum brane world model. Assuming
that the bulk is anti-de Sitter spacetime, the solutions for cosmological
perturbations are derived by summing mode functions in Poincar\'e coordinate.
The junction conditions imposed at the moving brane are solved numerically. The
recovery of 4-dimensional Einstein gravity at late times is shown by solving
the 5-dimensional perturbations throughout the infinite bulk. We also comment
on several possibilities for having deviations from 4-dimensional Einstein
gravity.
