Re: Smallville Season 11, it"s happening...
@Admiral James Kirk...I don't think Tess is back. I think Lex is imagining her. I suspect she is going to act as his "conscience" or something. The timing of her arrival, right after the discussion with Clark and Lex bringing her up...yeah I'm betting she's a figment of his imagination. He admitted to Clark that his memory is not entirely intact yet and fractured somewhat due to Tess's memory wipe. She's there as the last visage of his conscience.
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Ignoring the The Last Stand since 2011.