(covers information from an alternate timeline)
Upon learning of the damaged timeline that Kirk and Spock decided to correct, Thelin was supportive. Upon hearing that, Spock wished Thelin a long and prosperous life in whatever circumstances the corrected timeline placed him in. (TAS: "Yesteryear")
|First officers of the starships Enterprise|
|Enterprise NX-01:||Tucker • T'Pol • Sato|
|USS Enterprise:||Pike • Una • Spock • Decker • Saavik (as a trainee) • Thelin|
|USS Enterprise-D:||Riker • Kurn • Shelby • Data • Worf|
|ISS Enterprise NX-01:||Archer|
|ISS Enterprise NCC-1701:||Spock|
|USS Enterprise:||Spock • Kirk|
Background information Edit
Thelin was voiced by James Doohan.
His pale complexion, compared to known Andorians, was due to the coloring practices of TAS – Andorians were sometimes grayish, and Orions were pale blue or yellowish instead of green. The script of "Yesteryear" specified that Thelin was to have blue skin.
Perhaps coincidentally, in Star Trek Online, the USS Kirk is commanded by an Andorian named Thelin, who has similarly pale skin.
In the Star Trek: Myriad Universes story The Chimes at Midnight, which explores the timeline from "Yesteryear", Thelin's appearance is explained as being the result of having an Aenar parent. Thelin's full name is given as Thelin th'Valrass (β), following Andorian naming conventions that were established in the post-finale Star Trek: Deep Space Nine novels.
According to the novel The Fire and the Rose, the prime timeline version of Thelin was the first officer of the USS Ticonderoga. He was killed in an avalanche during a survey of an unexplored planet just one year after his posting.
According to the novel The Higher Frontier, Thelin's prime timeline counterpart served in Andorian Sector Headquarters in 2278.
Due to licensing restrictions preventing any mention of anything from Star Trek: The Animated Series, the All Our Yesterdays sourcebook changed Thelin's name to Thaalen and also changed the circumstances of Spock's death.