I suppose this might fall into that category the one-punch James Blish was always complaining about. If so, though, I think it would have to be classified as a twist-ending rather than a trick-ending deal. Anyway, even without the ending, it works fairly well, the long conversation occupying the large bulk of the story is interesting enough in it self, mostly. And I thought it rather amusing to have the TV producer and 4 (well 5) men discussing his new sf-type TV program. Oh yes, this happens on a train in 1959. All told, it's not that bad, I suppose. Clearly though, as some non-sequiturs (which he tried to patch up later) indicate, this is likely a first-draft story we're reading.