Erikson

From Memory Alpha, the free Star Trek reference

Lieutenant Erikson was a historian serving aboard the USS Enterprise under Captain James T. Kirk.

In 2269, with the assistance of the Guardian of Forever, Erikson joined Kirk and Spock in their observations of Federation history as well as firsthand accounts of the Orion history. (TAS: "Yesteryear")

Erikson was played by the voice of James Doohan. According to The Four Years War, a non-canon role-playing games sourcebook, his first name was Ted and his last name was spelled "Erickson".