MPs have demanded answers from both South Yorkshire Police and the BBC as to how the broadcaster seemed to know about the raid on Sir Cliff Richard's Berkshire home before it happened.
Home Affairs Select Committee chair Keith Vaz has written to both sides asking them to explain themselves.
In the letter, Mr Vaz asks when the BBC first learned of South Yorkshire Police's intention to carry out the raid, how the BBC received this information and if the police force confirmed the time and date of the planned search to the BBC.
He also queries if it is possible that any BBC journalist behaved inappropriately during the handling of the case and asks for a response by Friday August 22.
Depending what the responses are, witnesses from the police and the BBC could be called to give evidence to the committee when they resume in September.
There are currently 1.5 million people addicted to prescription drugs in the UK. The abuse of these types of substances is taking place in the shadows and its extent is still unquantified.
Local GPs need to report their suspicions and collate information to illuminate this problem.
– Keith Vaz MP, Committee chair
Lack of action would lead to "catastrophic consequences", Mr Vaz said.
The committee cited work by the All Party Parliamentary Group for Involuntary Tranquilliser Addiction which estimates that 1.5 million people are addicted to these type of drugs, far higher than those who are in treatment for addiction to illegal drugs.
Today is a "big opportunity" for two officers involved in the plebgate row to set the record straight, according to the chairman of the home affairs select committee Keith Vaz.
Detective Sergeant Stuart Hinton and Sergeant Chris Jones will appear before the committee for the second time in as many weeks, after the committee found their evidence to be "misleading".
Mr Vaz told BBC Breakfast: "I'm sorry to say that in a number of respects they have given evidence that was not strictly accurate, so this is their big opportunity today to come before the committee and to explain why that happened and to correct the record."
The chairman admitted he was frustrated with the time and cost of the inquiry: "I think we're getting near the end but I share your frustration and that of the viewers that this has taken so long and cost so much money - almost a third of a million pounds - and involved so many police officers."
The MP concluded that it was in the best interests of the taxpayer, Andrew Mitchell and the police officers involved that the saga be brought to a close.
A total of 19 clients of rogue private eyes will be investigated for illegal activity, the data watchdog has confirmed.
In a letter to Keith Vaz MP, Information Commissioner Christopher Graham said 125 victims were believed to be affected by the companies and individuals under criminal investigation for data protection breaches.
A list of clients of rogue private detectives will not be published by MPs "for the time being" after the data watchdog intervened.
Information Commissioner Christopher Graham urged the Home Affairs Select Committee not to publish a list of 102 organisations and individuals who used rogue investigators while his office conducted its own investigation.
Committee chairman Keith Vaz MP said: "The Information Commissioner has given the committee an explicit commitment that he will pursue this matter to its appropriate end and that the victims will receive justice."
Vaz said Graham would appear before the Committee after his "scoping exercise" so that MPs could assess whether the investigation "fulfils all that is required".