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We present a study of resonances in exclusive decays of $B$ mesons to $\bar{D}^{(*)}
D^{(*)} K$. We report the observation of the decays $B \to \Dbar^{(*)} D^+_{s1}(2536)$
where the $D^+_{s1}(2536)$ is reconstructed in the $D^{*0}K^+$ and $D^{*+} K^0_S$ decay
channels. We report also the observation of the decays $B \to \psi(3770) K$ where the
$\psi(3770)$ decays to $\Dbar^0 D^0$ and $D^- D^+$. In addition, we present the
observation of an enhancement for the $\Dbar^{*0} D^0$ invariant mass in the decays $B
\to \Dbar^{*0} D^0 K$, at a mass of $(3875.1 {}^{+0.7}_{-0.5} \pm 0.5)$ MeV/$c^2$ with a
width of $(3.0 {}^{+1.9}_{-1.4} \pm 0.9)$ MeV (the first errors are statistical and the
second are systematic). Branching fractions and spin studies are shown for the three
resonances. The results are based on 347 fb$^{-1}$ of data collected with the BaBar
detector at the PEP-II $B$ factory.
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