In this episode (number 14, if you're counting) we learn the fate of Skye, who was shot by Ian Quinn in the last installment. We also meet a new agent - John Garrett (played by Bill Paxton), as well as a super-powered denizen of Asgard, Lorelei (Elana Satine).
Here's the synopsis -
"TAHITI" - Coulson goes on the attack to save Skye--enlisting the aid of Ward's former S.O. John Garrett (Bill Paxton)--and uncovers shocking truths about his own life and S.H.I.E.L.D. - Disney/Marvel
Watch the first four minutes of the show in this clip -
Next, check out a clip showing Agents Coulson, Ward, Fitz, and Garrett infiltrate a secret base of some sort.