one of my favourite mentalist episodes so far is s4e07, blinking red light.
patrick jane discovers that a blogger, james panzer, who appears to have devoted his life to finding a serial killer, is actually the serial killer himself. but after panzer thwarts jane's attempt to expose him, jane manages to use his own long-time nemesis, the serial killer redjohn (who killed jane's family), to take down panzer, by tricking panzer into insulting redjohn (whom panzer had believed to be dead) on tv.
well, i guess it's not really the episode that i really enjoyed, but the idea behind it. when jane loses to a killer whose intellect is almost on a par with his, he is not too scrupulous not to resort to (1) employing the help of his own nemesis (whom he knows is smarter than him) and (2) pitting evil against evil.
there was something very satisfying about imagining redjohn putting panzer through the exact terror panzer put all his own victims through. i think this was a REALLY good episode, because it tied very tightly back to redjohn's recitation of william blake's poem, the tyger, back in season 2 or 3 -- the idea is that God created both the tiger and the lamb (i.e. evil and good), basically saying that redjohn and jane are in fact two sides of the same coin.
of course, this may be my favourite episode (so far), but my favourite scenes are nowhere as creepy...
one of them is jane's convo with big boss bertram in s4e02, little red book, where he basically commands bertram to get lisbon back on the team because she's the only one with some semblance of influence and control over him. and that's just so cute, because lisbon is...just so tiny and sulky and cute, hehe.
also, ultimate fave scene here (below), from s2e11, rose-coloured glasses. at the end of an epi where jane and lisbon crash a cheesy high-school reunion to look into a couple's death -- they dance. AWWWWWW!!!!!! <3 <3 <3 <3 <3 <3
p.s.: i'm not sure i quite understand how the mentalist is strong into its fifth season right now, but lie to me had to have its fourth season scrapped for apparently being "too intellectual" for its audience. i actually thought there was more actual stuff to gather from lie to me, and thus marginally more entertaining to me than the mentalist, which appears to be more drama than crime. maybe it was more thought-provoking, as i actually had to pause the videos more frequently to think through their analyses. okay, couch potato.