The widowed Doctor Crusher juggles the responsibilities of raising her son alone while also serving as Enterprise's Chief Medical Officer. Crusher, along with her later husband, had been acquainted with Captain Picard long before joining its crew.
Blind since childhood, LaForge uses his impressive technical knowledge as Enterprise's Chief Engineer. He originally joined Enterprise as helmsman, LaForge is promoted in TNG's second season.
Wesley lost his father at a young age and was raised alone by his mother, Beverly Crusher. Both of his parents had been acquainted with Captain Picard long before Wesley came aboard the Enterprise. Extremely intelligent and dedicated, Wesley eventually gains a field commission of Ensign before leaving to attend Starfleet Academy.