Natalia Ivanova is a Professor of theoretical and computational astrophysics within the Physics Department, University of Alberta. Her scientific interests include everything about the understanding of single, binary, multiple stars and clusters of them, stellar physics, and numerical codes that can create a star or many of them inside a computer. In 2010, she was appointed as Canada Research Chair in astronomy and astrophysics. Stephen Justham is currently based at the University of Amsterdam, where he is an acting group leader, on extended leave from a Professorship at the University of the Chinese Academy of Sciences. His research focuses on understanding the physics and consequences of stellar interactions, including how those help to explain the observed variety of stellar systems and explosive transients. Paul Ricker is a Professor of astronomy at the University of Illinois. His primary research interests lie in the application of hydrodynamical simulation to galaxy clusters and interacting binary stars. He is one of the principal authors of the widely-used Flash simulation code, sharing in the 2000 Gordon Bell Prize and, in 2001, he received the Presidential Early Career Award for Scientists and Engineers (PECASE).