'Castle' Season 8 Spoilers: Watch out Acapella Lovers

The long wait is finally over for all the fans out there because the hit TV series 'Castle' is now finally back for the second half of its eighth season. So stay tuned and read on because spoilers will be dished out here. 

The upcoming episode is entitled 'Tone Death' and judging by the title itself, the partners and couple Rick (Nathan Fillion) and Beckett (Stana Katic) will be back to solve another case which will involve death and "tone" maybe? 

According to the network’s official synopsis, Castle (Nathan Fillion) and Beckett (Stana Katic) will find themselves wrapped up in another murder – this time involving Castle’s mom, Martha (Susan Sullivan). Martha is fine, but the same can’t be said for one of her fellow performers. The episode description reveals that the husband and wife team will investigate a body found in the theater where Martha performs. 

Now that the duo is back to working together after being separated, they will still continue with their act of "not being together", "They’re back together, but they’re keeping it a secret,” executive producer Alexi Hawley explained to EW. “They’re fighting in public and romancing in private, which adds a little spark to their relationship.” 

Castle and Beckett will get wind of information about a body that was found inside the theater of Martha's (Susan Sullivan) latest show. 

Their investigation will lead them deeper down the rabbit hole where they unexpectedly get tangled up in the dangerous world of competitive a capella. 

Watch out for more and stay tuned as "Castle" Season 8B, which premieres this Monday, Feb. 8 at 10 p.m. on ABC, will also feature the acts of Jon Huertas as Javier Esposito, Molly Quinn as Alexis Castle, Seamus Dever as Kevin Ryan, and Toks Olagundoye as Hayley Shipton.