CONTAINS SPOILERS!

Someone else today mentioned Lisbon's "happy memory" --- "the song about the cake left out in the rain" that made her think of her mother feeding pigeons (lyric: "birds like tender babies in your hands").  I wrote yesterday about the pigeon clues (Episodes 1-3) and coffee clues (4-6).  Some of these happen in a park.

Well......the song Lisbon mentioned is called MacArthur's Park
And here are the lyrics:

"Spring was never waiting for us 'til it ran one step ahead

As we followed in the dance MacArthur's park is melting in the dark

All the sweet green icing flowing down

Someone left the cake out in the rain

I don't think that I can take it 'cause it took so long to bake it

And I'll never have that recipe again, oh, noI recall the yellow cotton dress foaming like a wave

On the ground beneath your knees

Birds like tender babies in your hands

And the old men playing Chinese checkers by the trees
MacArthur's park is melting in the dark

All the sweet green icing flowing down

Someone left the cake out in the rain

I don't think that I can take it 'cause it took so long to bake it

And I'll never have that recipe again, oh, no MacArthur's park is melting in the dark

All the sweet green icing flowing down

Someone left my cake out in the rain

I don't think that I can take it 'cause it took so long to bake it

And I'll never have that recipe again, oh, no"
--
Now, according to the spoilers from TV Guide, PJ is going to kill RJ in a park.  I think there's a connection between her "happy memory" that makes her SMILE and the pigeon clues and park clues we keep being "fed," so to speak.  Not that there's necessarily a story-line connection or some deep meaning, but that we've been fed hints that RJ will be killed in a park. Maybe there's more, but I don't know. 

And yes....I can't help but notice that MacArthur is very similar to McAllister!