Miles O'Brien's position on Deep Space Nine.

O’Brien also watched his future self die, and ended up dying himself and getting REPLACED by another self in that same episode. I often forget that the O’Brien we ended the series with, was not the same one who started the series.

I forgot about the Changeling impersonation in “Homefront/Paradise Lost”. (One of those episodes in the two parter.) That was a good scene.

In the TOS episode “Catspaw” Lt DeSalle got to sit in the captain’s chair when the top four were imprisoned on the planet. He was making progress in removing the force field when one of the aliens changed sides and removed.

His was a good character. I didn’t realized he was in as many episodes as he was, but I wish his had been a regular character.

I think Mr. Leslie was the background character who was on screen almost constantly.

Yes - in fact, if I remember the timing of his kidnapping and then return, it was actually the imposter Dr. Bashir who delivered the O’Briens’ second child, wasn’t it?

I tend to agree, certainly until Troi passed the starship-command course. After that, it’d be a closer call. Troi showed in “Face of the Enemy,” for instance, that she could be both smart and tough: http://en.memory-alpha.org/wiki/Face_of_the_Enemy_(episode).

Leslie was played by Eddie Paskey, who was also William Shatner’s stand-in. There are some interesting facts about him here:

It is obviously he in some parts of the fight with Kahn. Did the digitization thing cover that up?

On my remastered version, everytime the scene calls for a Kirk stunt double, he now shows as a Gorn.

It’s GREEN!

I don’t recall if Changeling Bashir delivered the O’Brien baby, but he definitely performed brain surgery on Sisko in the episode when he had visions from the Prophets. That was the debut of the “First Contact” uniforms for DS9, and when the real Bashir is seen in the Dominion prison camp, he’s wearing the older style.

A Changeling infiltrator performed brain surgery on Captain Sisko. THERE’S a frightening thought. I’d feel safer if he’d helped Kira deliver the baby.

“Yeah, it’s easy; you just catch.” --Tommy Lee Jones, “Men in Black”