AFAIK/IIRC he's NEVER done any Trek. Maybe he could've played Benedict Q. Cumberbatch's character in STxII(?). Or maybe that character when older in the future looking back ala Ru'afo in "Amadeus". Or anyone really in Trek. Hugh Laurie would've been good guest starring on DS9 as Bashir's brother (did he have ANY siblings? I forget now) or first cousin. Or maybe in Andy (middle name should be Is a) Dick's role in that VOY episode as the PROMETHEUS's EMH.
Maybe HL will show up in STxIII?
Maybe HL will show up in STxIII?