Star Trek - Doctor Who Connection

A Star Trek - Doctor Who Connection?

The scene is Star Trek, the original series. The episode is "Assignment: Earth." In this episode, the Enterprise finds itself at Earth in 1968, where they encounter a guy who calls himself Gary Seven. (Pic at left may help you recall the episode.)

Although Mr. Seven appears human, his true origins are mysterious. He clearly is not from 1968 Earth. His mission is also mysterious; it is, of course, up to Kirk and Spock to figure it out and determine whether or not they should allow him to complete it.

My thought is that Mr. Seven is not actually a human raised on faraway planet, as he says. I believe he's actually a Time Lord.
Here are some bits of evidence:

So that's my thinking. Does it seem plausible?

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