In the pilot, a snake is released into Lex's room while he's distracted, making you think it's an assassination attempt. It's actually a training exercise so he can intimidate the snake into backing down with a blood-curdling stare.
Episode 2 has Superman, incensed at Lex's endangering lives to test his abilities, pointing a gun at him, firing, and catching the bullet before it reaches Lex.
Superman: You want to see how fast I am?
'Faster than a speeding bullet' indeed.
The first season finale has the entire Planet staff working to bring Luthor down.
Jimmy beating Clyde Barrow in "That Old Gang of Mine" for Clark's "murder".