Two of the main cast members on ABC's Castle will perform in an entirely new way in the midseason premiere.

Will Rick's Missing Time Arc Conclude Soon On 'Castle'?

When Castle returns in February, fans will get the chance to experience two cast members using their pipes! Jon Huertas (who plays Esposito) and Susan Sullivan (Martha) are both singing in the midseason premiere, according to a new Entertainment Weekly report.

The episode, which is titled Tone Death, is centered on a murder within the world of competitive a capella. Corbin Bleu (High School Musical) is fittingly set to guest star in the episode.

Is Aubrey Plaza Returning As Lucy On 'Castle'?

Meanwhile, the Entertainment Weekly report also discussed what's ahead for Castle (Nathan Fillion) and Beckett (Stana Katic) now that they're seeing each other in private. Castle co-showrunner Alexi Hawley spoke of the special "spark" between them now that they have a little secret to protect.

 "They're back together, but they're keeping it a secret," he said. "They're fighting in public and romancing in private, which adds a little spark to their relationship."

Castle fans who have been desperate for new episodes are in for a treat this February. While the series was supposed to return on Monday, Feb. 1, ABC had to push it back for another Bachelor Live episode. But this means fans will be getting more Castle in a short amount of time.

The network is planning to air another new episode on Sunday, Feb. 14 followed by another new episode Monday, Feb. 15. That's three episodes in a very short amount of time.

Castle returns for the second half of season 8 Monday, Feb. 8 at 10 p.m. ET/PT on ABC.

Tags: Castle television ABC