Aidan Gillen as Petyr “Littlefinger” Baelish Credit: Helen Sloan/HBO

HBO have released a batch of new stills from episode four of ‘Game of Thrones’ Season 6, titled “Book of the Stranger,” featuring the return of Petyr “Littlefinger” Baelish (Aidan Gillen).

Emilia Clarke as Daenerys Targaryen and Souad Faress as Dosh Khaleen Priestess Credit: Helen Sloan/HBO

Diana Rigg as Olenna Tyrell and Ian Gelder as Kevan Lannister Credit: Helen Sloan/HBO

Gemma Whelan as Yara Greyjoy and Alfie Allen as Theon Greyjoy Credit: Helen Sloan/HBO

Michiel Huisman as Daario Naharis and Iain Glen as Jorah Mormont Credit: Macall B. Polay/HBO

Peter Dinklage as Tyrion Lannister Credit: Macall B. Polay/HBO

Official Synopsis:

Tyrion (Peter Dinklage) strikes a deal. Jorah (Iain Glen) and Daario (Michiel Huisman) undertake a difficult task. Jaime (Nikolaj Coster-Waldau) and Cersei (Lena Headey) try to improve their situation.

Returning series regulars on GAME OF THRONES this season include: Emmy®and Golden Globe winner Peter Dinklage (Tyrion Lannister), Nikolaj Coster-Waldau (Jaime Lannister), Lena Headey (Cersei Lannister), Emilia Clarke (Daenerys Targaryen), Aidan Gillen (Petyr “Littlefinger” Baelish), Diana Rigg (Lady Olenna Tyrell), Sophie Turner (Sansa Stark), Maisie Williams (Arya Stark) and Jonathan Pryce (the High Sparrow).

Additional returning series regulars this season include: Alfie Allen (Theon Greyjoy), John Bradley (Samwell Tarly), Dean-Charles Chapman (Tommen), Gwendoline Christie (Brienne of Tarth), Liam Cunningham (Davos Seaworth), Natalie Dormer (Margaery Tyrell), Nathalie Emmanuel (Missandei), Jerome Flynn (Bronn), Iain Glen (Jorah Mormont), Isaac Hempstead-Wright (Bran Stark), Conleth Hill (Varys), Kristofer Hivju (Tormund Giantsbane), Michiel Huisman (Daario Naharis), Michael McElhatton (Roose Bolton), Hannah Murray (Gilly), Iwan Rheon (Ramsay Bolton), Carice van Houten (Melisandre), Indira Varma (Ellaria Sand) and Tom Wlaschiha (Jaqen H’ghar).

New cast members for the sixth season include: Pilou Asbaek, Essie Davis, Souad Faress, James Faulkner, Richard E. Grant, Ian McShane, Joe Naufau, Freddie Stroma and Max von Sydow.

‘Game of Thrones’ Season 6, Episode 4 “Book of the Stranger” airs May 15th on HBO at 9pm.