Complex sentence: The NVALA had been critical of the series before but the complaints reached their height in the Hinchcliffe-produced "The Deadly Assassin", where an attempt is made to drown the Doctor at the end of an episode.
Split into simpler sentences: The NVALA had been critical of the series before but the complaints reached their height in the Hinchcliffe period. Her strongest criticism was for "The Deadly Assassin", where an attempt is made to drown the Doctor at the end of an episode.