Illustration of the inner and outer orbits in a hierarchical triple system with masses m₁, m₂, and m₃ along with their orbital elements: semi-major axes, eccentricities, and mutual inclination. The mass streams of a Roche-lobe-filling tertiary that lead to BA (intersecting with the inner orbit) or the formation of a CBD (intersecting with itself) are depicted. We note that the figure is not to scale.