Supernatural's Winchester Brothers Set to Ride Off Into the Sunset

After fifteen years and 300+ episodes, The CW bids farewell to Sam and Dean Winchester tonight as Supernatural airs its series finale, preceded by one-hour look back at their greatest adventures.

Also today: Meredith keeps dreaming on Grey's Anatomy, The Fresh Prince of Bel-Air stages a reunion special, and the Jersey Shore knuckleheads take over an entire resort for their latest family vacation. Here's what's new and noteworthy on TV this Thursday:

SERIES FINALE: A lot has changed since the series premiere of Supernatural, but the Winchester brothers are set to take their last ride tonight as the series closes out its fifteenth and final season. Watch preview. 9:00 PM ET on The CW

SPECIAL PRESENTATION: Ahead of the series conclusion, the CW is airing airing the pre-finale special Supernatural: The Long Road Home, a look back at the show's long and winding path from WB pilot to grizzled CW battle horse. 8:00 PM ET on The CW

NEW EPISODE: If you loved last week's shocking ending, tonight's Grey's Anatomy promises more where that came from. Also: Koracick (Greg Germann) is put in charge of the new interns, Link (Chris Carmack ) operates on a sex therapist, and Maggie (Kelly McCreary) finds comfort in Winston’s (Anthony Hill) virtual presence. Watch preview. 9:00 PM ET on ABC

REUNION SPECIAL: Will Smith takes to a replica of his old show's set for HBO Max's The Fresh Prince of Bel-Air Reunion, where he and the show's cast (including two Aunt Vivs) share behind-the-scenes stories and discuss the show's lasting legacy. Watch trailer. Streaming on HBO Max.  

SEASON PREMIERE: Snooki may be gone, but the party continues as Jersey Shore Family Vacation returns for a fourth season. Tonight's two-hour premiere is set to see the cast take over an entire resort where they will live their "best lives" in their own Shore bubble, according to MTV. Watch trailer. 8:00 PM ET on MTV

SERIES PREMIERE: Billie Piper stars in the eight-part British drama I Hate Suzie, in which she plays a well-known actress whose life is turned upside when her phone is hacked and sensitive pictures of her are shared online. Watch trailer. Streaming on HBO Max

SEASON PREMIERE: In the aftermath of Eddie's (David Giuntoli) accident, Katherine (Grace Park) leans on their friends for support on A Million Little Things. Meanwhile, Rome (Romany Malco) and Regina (Christina Moses) face a gut-wrenching decision, Delilah (Stephanie Szostak) is inspired by her children's success, and Maggie (Allison Miller) gets a fresh start in Oxford. Watch preview. 10:00 PM ET on ABC

ORIGINAL MOVIE: It's Vanessa Hudgens times three in the Netflix original sequel The Princess Switch: Switched Again, in which Stacy (Hudgens) and Margaret (Hudgens) stage yet another switch. But when a familiar looking party girl named Fiona (Hudgens, again) shows up, it seems their plans may be in danger. Watch trailer. Streaming on Netflix

SERIES PREMIERE: The Spanish language series Veneno details the life and death of Spanish transsexual singer and television personality Cristina Ortiz Rodríguez, better known as La Veneno. Watch trailer. Streaming on HBO Max

Mike Attebery is Senior Editor at Primetimer and the author of seven mystery thrillers. Follow him on Twitter at @mikeattebery.