"Greg Schmeg" (May 6th, The CW)
Sam is less than thrilled when Andi's ex-boyfriend Greg reappears on the scene and asks Andi out on a date. To Sam's shock and dismay, Andi accepts and decides to break up with Sam. Suspicious about Greg's sudden power of persuasion, Sam investigates and discovers Greg has sold his soul to the Devil in order to win back his one true love.

"Time Is On My Side" (May 8th, The CW)
As time runs out for Dean, Sam convinces him to head to Eerie, Pennsylvania to investigate a possible zombie case. Instead, they discover Doc Benton, a real-life doctor who, in 1816, abandoned his medical practice to follow his obsession with finding the key to eternal life by drugging people and stealing their vital organs. Meanwhile, Bobby finds out where Bela is hiding, and Dean heads out to confront her, leaving Sam behind to deal with the good doctor. Dean and Bela battle it out for the last time, and Dean leaves Bela in a desperate, and possibly fatal, position.

"What's Left Behind" (May 9th, CBS)
Beth learns more about Mick's secretive past when the grandson of Mick's WWII war buddy is kidnapped.

"The Leak" (May 13th, The CW)
After Sam turns in a soul named Mike, who somehow keep returning to Earth, the Devil tells him there is a leak in Hell and he better find out who is responsible. Sam, Sock and Ben discover Gladys is helping Mike escape and aren't sure whether to turn their friend over to a very angry Devil.

"No Rest For The Wicked" (May 15th, The CW)
Season finale! It's 30 hours before Dean's deal with the crossroads demon is up and Dean, Sam and Bobby are searching for Lilith, who holds the contract. They discover her location and Sam summons Ruby for help despite Dean's protests. Ruby warns them they aren't ready to fight Lilith yet but they steal her knife and depart for New Harmony, Indiana. In a battle to the death, Sam, Dean and Bobby take on Lilith and all her demons in a last ditch effort to save Dean's life.

"Sonata" (May 16th, CBS)
Season finale? Mick and Beth face the ultimate consequence of a relationship between mortal and immortal when a vampire kills a human in the heat of passion. But when the murder investigation threatens to expose vampire identities, Mick and Josef take action. Guest starring Claudia Black ("Stargate SG-1").

"Cancun" (May 20th, The CW)
Season finale? The demons target Sam when they fear he may pose a greater threat to their rebellion than the Devil himself. A treacherous trap is set, bringing surprising allies to Sam's side and leading to shocking revelations that could have explosive implications for his future. Meanwhile, Sock falls for a demon.

Your guess is as good as ours. Fall lineups will be announced in May. But Supernatural, Pushing Daisies and The Sarah Connor Chronicles have been renewed and Sci-Fi will have several new shows. Eureka returns in July.