There may not have been a big finale. It could have just ended with a regular episode. It's available on Amazon if you're dying of curiosity. I wasn't that big a fan of the show, but I remember seeing it with my sister a few times.
shareIt ended horribly, with "just another episode", rather than having an episode showing the doctors coming up with a successful way to reverse his invisibility.
The viewers were indeed "robbed" of a happy ending.
All the episodes can be viewed on YouTube.
It was cancelled unexpectedly due to budget. There was no finale, it just disappeared.
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