So who was the person that tried to blackmail Martha with the tape?

[Kane]

I'm not sure if this was ever revealed...but it was referenced again in Oracle...leading me to believe its still an unsolved mystery.

Was it Lionel? I thought hes turned into an honest saint...

I wonder how it will be resolved...if it will be

 

[NotFadeAway]

Lionel probably set it up........just so he could save the day and make Martha trust him!!!!

 

[Kane]

But Lionel isnt that duplicitous anymore....or thats how they write him...

Personally Im not sure whats in his head at the moment..

 

[triplet]

Lionel probably set it up........just so he could save the day and make Martha trust him!!!!

I think that is entirely possible, it was an exploding luthorcorp warehouse she'd gotten rescued from in Lockdown that the video was taken at after all...

 

[NotFadeAway]

Just trying to prove himself trustworthy...................duplicite for a good reason in his eyes!!!!!!!!!!!

 

[The Incredible Hulk]

they covered this in Void and Mercy. Lionel was the one who had it sent to her, so he could gain her "trust" by making her think he was protecting her from someone else.