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![](https://image.tmdb.org/t/p/w342/4T7GUHvNpuK9z5HuBd5ZBkJDhEM.jpg)
Harvey Gras
Gregg disrupts David's train of thought just when he is on the verge of cracking the most famous unsolved math problem, so the family teams up to get him back on track.
![](https://image.tmdb.org/t/p/w300/gx2X3Nt34rHqQCS4Q3dUnmXmORA.jpg)
![](https://image.tmdb.org/t/p/w300/yzr25ztGyFocnCFuvWpKVfAhZxb.jpg)
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Other episodes for this season
![Pizza and Wings](https://image.tmdb.org/t/p/w300/3VHpPpnggVM7ziACdX59wvilFL6.jpg)
![#IGoThere](https://image.tmdb.org/t/p/w300/jIzNyEjYEGKUIzBVNaE9nv44ZIs.jpg)
![Sip for Sip](https://image.tmdb.org/t/p/w300/9fJrkooAXdHrXxv2jkYp3NKvylb.jpg)
![Operation Thingus](https://image.tmdb.org/t/p/w300/ursNyZRx7M6OctBnG8dMZ4ypC0p.jpg)
![Shiva](https://image.tmdb.org/t/p/w300/xE95dxy0aFhtUJkYLktLcrX8BAZ.jpg)
![Koi Story](https://image.tmdb.org/t/p/w300/1C8AzTaJFbx0VQ3KV0HTVGk7GgM.jpg)
![Music Under The Stars](https://image.tmdb.org/t/p/w300/8P4tXGeX1mHnEEqUHwrgvSP4BMJ.jpg)
![Nobody's Home](https://image.tmdb.org/t/p/w300/f62oApTcwFyxHWW2uFN2mK50r.jpg)
![Harvey Gras](https://image.tmdb.org/t/p/w300/ugv302WCHu8DqgeTsXYTJMP3atW.jpg)
![The Langer Games](https://image.tmdb.org/t/p/w300/lEifc8ydOT26DzC9S2FgtldLVzj.jpg)
Gregg disrupts David's train of thought just when he is on the verge of cracking the most famous unsolved math problem, so the family teams up to get him back on track.