Shat was perfect in this sketch, playing Kirk as straight as if he were in Star Trek. Bill may have his flaws as an actor, but his ability to memorize lines is not one of them. He is known as one of the quickest studies ever. It’s great to see an SNL host who came totally prepared and didn’t have to read off the cue cards in one of the show’s longest sketches (8 minutes).
Also …
I must have gotten a little dust in my eye while watching the great Phil Hartman, seen here as “Bones.”

Shat has never minded poking fun at himself.
I think that’s the same guy playing Sulu as in the first SNL Trek spoof with Belushi (god rest his coke-snorting soul) as Kirk.
Strange they’d pick on him for gaining weight. Scotty is the more-traditional chunking out target.
Yeah he’s played Sulu four times over the years
On a related note, Lindsay Lohan was also an excellent guest host who got all her lines perfectly without cue cards. That was before she crashed.