A scientist from Bilana III who develops the soliton wave, an experimental means of propelling a ship at warp speed without a warp drive, which the Enterprise helps to test in 2368.
Doctor Ja'Dar is the scientist in charge of the soliton wave project on Bilana III, seen in the fifth-season episode New Ground. His idea is to have a ship ride a wave of subspace energy generated on one planet and dispersed at another, removing the need for warp engines aboard the vessel itself.
The Enterprise-D monitors the first full test, in which an unmanned ship is to be carried from Bilana III to Lemma II. The test vessel is destroyed and the wave runs out of control, gathering energy as it heads for the colony at its destination.
Ja'Dar advises the crew from Bilana III while they overtake the wave and break it up with photon torpedoes.