NBC's "Parenthood" returns with an all-new episode this Thursday, which promises to be intense as Kristina faces another cancer scare.

In a promo video of the upcoming episode, "The Enchanting Mr. Knight," Kristina and her husband face uncertainty as they go in for another cancer checkup. In the meantime, just as Sarah gets serious with a new love interest, Hank realizes that he still has feelings for her.

According to AceShowBiz, NBC released an official synopsis of the episode, which reads: "Kristina (Monica Potter) goes in for a checkup, but that doesn't stop her from starting a new adventure. Amber (Mae Whitman) encourages Drew (Miles Heizer) to move on from his past, while Julia (Erika Christensen) struggles to let go of hers. Sarah (Lauren Graham) gets an appealing offer from Carl (Josh Stamberg), but decides her work is more important. Hank (Ray Romano) admits that feelings are still lingering for an old relationship."

There's also a lot to look forward to in the rest of season 5 in the comedy-drama series.

According to TVLine, the rest of the season will heat up as Matt Lauria is set to return as Ryan during the penultimate episode. There's also a chance that he may appear in the finale. Furthermore, fans can look forward to meeting Ryan's mom, a "three Bloody Marys for breakfast" type of woman who failed to provide her son with motherly and emotional support.

Later on this season, Sarah Ramos will reprise her role as Haddie, Adam and Kristina's eldest daughter, TVLine reports exclusively. Although her contract on the series ended at the end of Season 3 when her character went off to college, she appeared throughout Season 4 to support to her cancer-stricken mom. Her comeback in this season's finale will mark her first appearance on the show in a year.

"Parenthood" returns on Thursday, March 6 with " The Enchanting Mr. Knight " on NBC at 10 p.m. EST.

Watch a promo below.