Some 15 years ago, when I started to get interested in the Blackmar Diemer, I was often faced with the annoying O'Kelly defense. Over time, I learned to deal with it, but at the time, it was a defense that made me tremble with fear.
So I started to investigate stange lines, to make the attack playable - that's how I come to discover the Start Trek attack : "To boldly go were no man has gone before"... I remember the feedback from a fellow BDG author : "That 's quite optimistic ?!"
Anyway, here is the Star Trek attack : 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 c6 6.Bc4 Bf5 7.Ne5 e6 8.Nxf7 ?? Kxf7 9.0-0
Let's look at black's most natural response : 9...Ke8 10.Kh1 (diagram)
I often need this move, so why not play it immediately - it allows me to wait for black's move and respond accordingly.
Let's look at one of black's most normal moves : 10...Nbd7 11.Qe2 (diagram)
Black has many moves at his disposal, let's see what happens if he tries to defend the pawn with 11...Qe7 12.Bg5 (diagram)
Black can now try to run in his king to safety, eg 12...Kd8 13.Rae1 Kc7 14.Bf4+ Kc8 15.h3 and with has compensation for the piece
From the starting position above, the defender could try to initiate a pawn storm on the white king : 12...h6 13.Bh4 g5 14.Bg3 h5 15.Rae1 h4 16.Bd6 with a difficult position
Lastly, the normal line 12...Nb6 13.Bb3 Nbd5 brings equal play after 14.Bxd5
So it sure seems the Star Trek attack might be worth a closer look !