Based on Voyager 2 observations, a numerical model of the heliosphere, which includes the mutual interaction of the interstellar medium, solar wind plasma, and interstellar hydrogen, is employed to speculate on the possible crossing of the termination shock by the Voyager spacecraft. The multiple crossings caused by large-scale solar wind fluctuations are studied quantitatively. In the event that Voyager 2 reaches the interstellar medium, the possibility of detecting interstellar ions with the MIT plasma experiment instrument (PLS) is discussed. ©1999 American Institute of Physics.