March 23, 1967 –
The Star Trek episode The Alternative Factor first airs on NBC TV on this date. Unfortunately, many fans consider this one of the worst episode of the Star Trek franchise.
In it, the Enterprise encounters a scientist with the ability to shift between universes who claims to be pursued by a monster.
John Drew Barrymore was originally cast as Lazarus, but failed to show up for the shoot. The director Gerd Oswald decided to shoot scenes which didn’t involve his character. On the second day, it was decided to either shut down production and scrap the episode overall or find a replacement. Rob Brown was dragged in to the set, right after he agreed to play the role.

