Complex sentence: The episode was first read by the cast on Friday, December 14,1990, table reads ususally took place on Wednesdays, but the read-through of "The Bet" was held on December 12.
Split into simpler sentences: The episode was first read by the cast on Friday, December 14,1990. Table reads usually took place on Wednesdays, but the read-through of "The Bet" had been held on December 12.