Edmund Burke on "The Mentalist" on October 13

The roses of the episode title don't show up until 3/4 into the show, shortly after we see the quote attributed to Edmund Burke. But as wikipedia points out:

The statement that "The only thing necessary for the triumph of evil is for good men to do nothing" is often attributed to Burke. Burke never said this but, in 1770, he wrote in Thoughts on the Cause of the Present Discontents that "when bad men combine, the good must associate; else they will fall, one by one, an unpitied sacrifice in a contemptible struggle."

The new boss, Luther Wainright, has to deal with Patrick and Henry Tibbs, the bad guy of the episode. Luther to Tibbs: We are with the government and we are watching you.

Patrick to Tibbs: that vacancy sign in your soul.
Cho: You're under arrest for the attempted murder of everybody.

Patrick to Luther: that's kind of like, my spot. (...) to be honest I was rooting for you. The plan that was approved by you was to catch him in the act.
Luther to Patrick: That psychopathy test. Glibness and superficial charm. Sense of self-worth.
Congratulations Jane according to the score you are a clinical psychopath.

Patrick to Lisbon: do you think I have an antisocial personality