Hadronic $B$ decays to open charm and time-independent $\gamma$ results at LHCb

Studies of hadronic $B$ decays to open charm at LHCb have led to first observations of several $B \rightarrow D \overline{D}'$ decays and of the decays $B^0 \rightarrow D^{*-} K^{+} \pi^{-} \pi^{+}$ and $B_{s}^0 \rightarrow \overline{D}^0 K^- \pi^+$. The branching fractions of other $B \rightarrow D \overline{D}'$ decays, of $B^0 \rightarrow D^{*-} \pi^{+} \pi^{-} \pi^{+}$ and of $B^0 \rightarrow \overline{D}^0 K^+ \pi^-$ have also been measured and a limit has been set in the search for the decay $B_{s}^0 \rightarrow D^{*-} \pi^{+}$. In addition, constraints have been placed on the CKM angle $\gamma$ and related parameters using time-independent ADS and GGSZ analyses of $B^{\pm} \rightarrow D K^{\pm}$ decays.