What I do if my cover is blown up?

As an Investigative Reporter,I often go undercover.I admire investigative reporter,Neille Bly  for her excellent underground reportings.Deception may play a major role in any undercover operation.But the information obtained must be of profound importance.it must be of vital interest such as revealing great system failure at the top levels or it must prevent profound harm to individuals. I keep certain things in mind before any undercover operation.
What I do if my cover is blown up?
Can I lie to maintain my cover?
What happens If I see a crime being committed?
So,I prepare myself.Few years ago,I went underground to unearthed a sex-racket.I took a job at a message parlour.For this purpose,I underwent training as a masseur.As an investigative reporter,we should know how and when to use the hidden cameras-spy cams.I think when I use deception to gain access for reporting,I should maintain my cover.Therefore,I personally take some precautions such as I behave like them,learn their lingo and use my contacts to get access.I think that without preparation and proper planning we should not go into the field.I remember one incident where I interviewed a woman secretly, though she knew that I’m a reporter,sued me for defamation.she accused me of using a hidden camera to tape her.After that,I became cautious.Before any undercover operation meticulous planning is necessary -use of hidden cameras-spy cams without planning and preparation may ruined reporter’s carrier and badly damage the image of TV stations.