See that part I kinda hated - I mean I can write if off (right now) as Lucifer just having been overly excited to be back, but if MC keeps playing it like he did at the end of the episode then -- well, I can't soften the blow because I'll literally hate it.
(On the other hand, there is potential for fun by having MC playing Lucifer trying to play Cass at least around Dean and Sam I'm just not sure that'll work out well either, because Supernaturals Lucifer has just never been a comedy machine and he shouldn't be turned into one now.)
As for Rowena coming back - it's Supernatural (and I'm kinda tired of being able to say that in regards to this show to be honest - probably why I'm so deeply in love with Billie right now), but then again she was basically killed by the devil so one would like to believe that would stick a bit more than if she'd be killed by some random or even Dean and/or Sam.
However, it's not just the stuff from the first paragraph that keeps me from being able to love this episode. I've worked it out and I think it's the potential plot-holes that this episode opens that keeps me from really loving this episode.
Remember the whole thing about angels "riding" humans is that it's a bloodline thing. When Lucifer took Nick over Sam poor Nick starting literally falling apart because he wasn't the proper vessel, so by all previously established (and I can hear Carver and company laughing as I type this) canon Jimmy's body should start falling apart quite like it did during that whole Leviathan story arc.
I mean I can think of ways around that and clearly have been, but it annoys me because I'm not a paid writer on this show so it's literally not my job to start patching holes the actual writers open up. They're the ones being paid to take care of things like this not me.
Anyway, while Jimmy has been an angel condom for years now he isn't a proper condom for Lucifer since that's been clearly established to be Sam Winchester.
I mean sometimes I think maybe Dean could become Lucifer's condom without decay (not that Dean would ever in a million years say yes unless it would be to save Sam), because his bloodline is the same as Sam's, but that's not the impression canon has given over the years. Canon has established that Sam is Lucifer's and Dean was (or should have been) Michael's (and my hand-wave there is that Adam wasn't hijacked long enough to start to breakdown like Nick did), which leaves one thinking despite having the same bloodline they aren't interchangeable despite that little Adam blip. *shakes head and moves away from tangent*
However, since the show is now playing that Jimmy is dead that means Cass has been riding around in Jimmy's corpse, because I don't think anyone can argue that if Cass (now Cass and Lucifer) leaves the body would finally drop since by the shows own story (CarverCanon) there's no human soul left in the body, so I could see that going either way. Because the human soul is long gone (CarverCanon) leaving the body itself a corpse it breaks down even faster than Nick did, or because it's a corpse Lucifer can hold it together better than Nick's body because we have seen that happen with demons - they keep even a fatally wounded body together until they leave it behind.
Tim (needs lighter): ...and none of you smoke.
Art (looks at armada): Nobody smokes? This is Kentucky, not Sausalito. What's wrong with you people!
in KY toss a cat u'll hit a smoker! So that's where Justified
puts the fiction in the show.)