Tarmin adds that their abilities require years of training, and his son Jev, also part of the delegation, has not yet reached his potential.

Riker speaks to Jev as the last person seen talking to Troi, and asks whether he would submit to medical tests to make sure the Ullians do not carry any harmful toxins or pathogens.

Dr. Crusher's scans of Troi and Riker show electropathic activity typical of a rare neurological disorder, Iresine Syndrome.

Following Dr. Crusher's research, Geordi looks to other cases of Iresine Syndrome in Federation records, eventually discovering two that occurred while a Ullian delegation was present.

Suddenly, security personnel arrive and take Jev into custody; Data and La Forge had discovered two additional instances of unexplained comas; Tarmin was not present when they occurred.