Answer: Unfortunately I have not seen the show you mentoned however there are a number of self watering containers on the market now. These have a reservoir at the bottom that you keep filled with water. You could check with your local garden center and also try mail order sources such as Gardeners Supply (put self watering in the search box). They offer a specialized tomato planter that could be placed on casters to make it moveable, for example.
I hope this helps!
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