Karl-Heinz Bohm and Erika Bohm-Vitense arrived at the University of Washington Astronomy Department in 1968. Over the next decades their research programs made important contributions to various aspects of stellar evolution. Karl-Heinz worked on Herbig-Haro objects and other types of pre-main sequence stars. Erika made major contributions to stellar abundances, convection and rotation. Both of them served as advisors for the Ph.D. research of many graduate students and were known particularly for their teaching of graduate courses. In this colloquium we will highlight the backgrounds and some of the research contributions of this UW Astronomy Dynamic Duo.