What happenned to Dave Thomas from Rocket Ship 7 television program?

You're likely thinking of Dave Thomas from the popular 1980s television series "The Dave Thomas Show", which was a spoof of talk shows. He was not on a show called "Rocket Ship 7".

Dave Thomas was a Canadian actor and comedian known for his work on "The Dave Thomas Show", as well as other projects like "SCTV" and "The Kids in the Hall".

If you're looking for information about Dave Thomas' career, you can find it on websites like Wikipedia and IMDb. If you are thinking of a different Dave Thomas, please provide more details so I can help you further.