In the episode “Hatchery”, Ensign Walsh was in the armory when T’Pal’s mutiny began. Here’s a shot of him as he meets up with the rest of the officers (click thumbnail for full image):
Walsh went with Trip down to the hatchery to get Captain Archer. After they moved through the hatch and into the chamber, I got a pretty good shot:
His only line, as far as I can tell, was saying “Yes Sir” after Trip told him “You’re with me”.
I’m not sure if he’s going to end up a red shirt, or if he’ll have a recurring role as Walsh. It’ll be interesting to find out. His name wasn’t even in the opening credits, though, so I guess he’s not important enough just yet. He might have been listed in the closing credits, but I don’t have those to check.
TV Tome doesn’t list him either. I submitted the info; we’ll see if they add it. I listed him as “Duncan K. Fraser”, because there are two Duncan Frasers in Hollywood already. Useless Trivia: the K stands for “Kirkson”, because he’s the son of Kirk Fraser. Yes, that is true.
So yeah…he’s on Enterprise.
(Funny that they’re fighting “the Insectoids” now. AJ might–might–understand that joke.)