Let the Good Times Roll

Let the Good Times Roll is the 23rd episode and the season finale of Season 13. It aired on May 17, 2018.

Summary
Our heroes, Sam and Dean Winchester, continue to be tested in the battle between good and evil, but one impulsive decision could alter the lives of one the brothers forever.

Plot
TBA.

Main Cast

 * Jared Padalecki as Sam Winchester
 * Jensen Ackles as Dean Winchester and Alternate Michael
 * Mark Pellegrino as Lucifer
 * Misha Collins as Castiel
 * Alexander Calvert as Jack

Special Guest Stars

 * Jim Beaver as Alternate Bobby Singer

Guest Stars

 * Samantha Smith as Mary Winchester

Co-Stars

 * Christian Keyes as Alternate Michael
 * Katherine Evans as Maggie
 * Stephi Chin-Salvo as Ryan
 * Agape Mngomezulu as Nate
 * Jag Bal as Werewolf #2

Featured Supernatural Beings

 * Angels
 * Archangels
 * Dragons
 * Ghoul
 * Nephilim
 * Primordial Entity
 * Seraphim
 * Werewolves
 * Witch

Continuity

 * Werewolves were previously featured in Breakdown.
 * Holy Oil was previously used in Scoobynatural.
 * Archangel Blades were previously used in Exodus.

Trivia

 * This is the second season finale to feature a Nephilim with All Along the Watchtower in Season 12 being the first one.
 * This is the third season finale to feature Mary Winchester with Alpha and Omega (Season 11) and All Along the Watchtower in (Season 12) being the first two.
 * This is the third season finale to feature Lucifer with Swan Song (Season 5) and All Along the Watchtower (Season 12) being the first two.
 * This is the ninth season finale to feature a version of Bobby Singer with Devil's Trap (Season 1), All Hell Breaks Loose - Part 2 (Season 2), No Rest for the Wicked (Season 3), Lucifer Rising (Season 4), Swan Song (Season 5), The Man Who Knew Too Much (Season 6), Survival of the Fittest (Season 7) and All Along the Watchtower (Season 12) being the first eight.
 * This is the fifth season finale to feature an Archangel, with Lucifer Rising (Season 4; Lucifer), Swan Song (Season 5; Lucifer and Michael), The Man Who Knew Too Much (Season 6; Raphael), and All Along the Watchtower (Season 12; Lucifer) being the first four.
 * This is the second season finale to feature multiple archangels, with Swan Song (Season 5; Lucifer and Michael) being the first.
 * This is the second season finale to feature an alternate universe, with All Along the Watchtower being the first.
 * Both All Along the Watchtower and Let the Good Times Roll feature Apocalypse World.
 * This is the fourth episode of the season to feature all the main characters with Lost & Found, Beat the Devil and Exodus being the first three.
 * Filming concluded on this episode April 20, 2018 finishing the entire season as a whole.
 * This episode marks the first time Castiel sees Alternate Michael.
 * As of this episode, all of Team Free Will has met Alternate Michael.
 * This is the second episode Team Free Will 2.0 go on a hunt together with Tombstone being the first one. They are implied to have become a full-time hunting team following their return from Apocalypse World.
 * This is the third episode where Jack is seen sleeping with Lost & Found and The Rising Son being the first two.
 * This is the third episode to feature a death of an Archangel with The Man Who Knew Too Much and Exodus being the first two.
 * This is also the second season finale to feature a death of one with season 6 (Raphael) being the first one.
 * This is the second episode where a Winchester allows an Archangel possess them.
 * This is the second season finale where a Winchester allows an Archangel to possess them, Season 5's Swan Song being the first.
 * As of this episode, Michael is the only Archangel alive on Earth following the death of Lucifer.
 * Dean experiences flashbacks to Sympathy for the Devil and Changing Channels to when Zachariah and Gabriel tell him about his being the Michael Sword, the one true vessel of Michael.
 * Dean becomes the vessel for the Apocalypse World Michael in order to battle and finally kill Lucifer. Afterwards, Michael takes full control of Dean's body and departs, loose upon the Main Universe in his true vessel.
 * Due to his deal with Michael when becoming his vessel, Dean displays the powers of teleportation, flight, invulnerability and regeneration while battling Lucifer. He also gains the ability to use an archangel blade to kill an archangel despite the fact that the blade can only kill archangels in the hands of another archangel.