Surprisingly, this has yet to be addressed here. The title says it all; let’s have a discussion about the twenty-fifth (and final) tweet post made as part of the Advent on The Twitter page.
For those who have not seen this post, a silhouette of a characters profile is shown, with the caption “do you think that this person will return too?” .
Many people (myself included) immediately thought of Jeff Tracy. However, the use of the phrase “return too” is open to interpretation, with one view being from the series’ viewpoint, which is Jeff has not been in the series yet so he cannot “return too”.
Away from the theory of Jeff Tracy, there is still the unfinished story-arc centred around The Mechanic, a character whose face has only been seen once, which too was shown only as a profile”, so this could be coincidental, or not.
Of course, there is always the possibility that the one comment made that The Mechanic is Jeff Tracy holds some validity. But, if true, that would irritate many fans.
So, the question remains: Who is this mystery person?
: The Twitter, https://mobile.twitter.com/ThunderbirdsHQ/status/1077511772297445376