We're still waiting on some kind of official confirmation that the upcoming 'Psych' season 8 will be the show's last, but if nothing else, 'Psych'-os are certainly in for a memorable run. UK and recent 'Elementary' star Vinnie Jones will be a bit of a menace to the new season, along with 'The Wonder Years' star Olivia D'abo and 'New Girl' guest Kali Hawk.

Hawk will take the role of a crafty private investigator whose case leads her directly to Shawn and Gus, the latter of whom becomes immediately enraptured with her. Both Jones and D'Abo will take on more-related roles, that of a brutal British criminal and his “master infiltrator” and right-hand lady, respectively.

As previously announced, 'Princess Bride' and 'Saw' star Cary Elwes will also return for the eighth season as fan-favorite Pierre Despereaux, while Kristy Swanson (original 'Buffy the Vampire Slayer') will return as Marlowe.

Currently, 'Psych' season 8 has been ordered for eight episodes with an additional five scripts produced, none of which have been confirmed to shoot. Most have suggested that the eighth season will prove to be the last, but USA has declined to comment. The series has yet to air its seventh season finale, "Psych: The Musical," currently slated for December.

What say you? Are you looking forward to the new 'Psych' guest stars, or will they prove heralds of the end?