This workshop was inspired by the recent discovery of several "Transitional Millisecond Pulsars", which alternate between active accretion and radio pulsar states. It aims to bring together observational/theoretical experts in many different areas, in order to make new connections between different types of accreting astronomical objects. A primary goal is to find links between transitional millisecond pulsars and other types of accreting compact objects, in order to foster new collaborations and novel research lines.