Castle and Beckett look into the murder of a young mathematician gunned down with a 200-year-old bullet, sparking some wild theories by Castle about a time-travelling killer.

More / Larger Images: Castle Season S03E04 Photos / CASTLE-TV.INFO : ABC Castle TV Show FanSite & Info Archive

CASTLE – “Under the Gun” – When a coded document hidden by a murdered bail bondsman gets Castle’s imagination running wild, Beckett must steer the case back to the violent felons who populated their victim’s world – only to discover that maybe Castle’s crazy theories aren’t so crazy after all. Complicating matters is the surprise arrival of Beckett’s ex-partner (now a bounty hunter). As the two reunite over a history that Castle has no part of, Castle is forced to watch the relationship take a turn towards the romantic, on “Castle,” MONDAY, OCTOBER 4 (10:01-11:00 p.m., ET), on the ABC Television Network. (ABC/ADAM LARKEY)

More / Larger Images: Castle Season S03E03 Photos / CASTLE-TV.INFO : ABC Castle TV Show FanSite & Info Archive

CASTLE – “He’s Dead, She’s Dead” – When a famous psychic is murdered, Beckett and Castle search for her killer while also carrying on a spirited debate on the existence of extrasensory abilities. Evidence mounts on both sides, especially when a letter arrives from the victim, penned the day she was killed and predicting her own death — or was it written by a clever killer, hoping to throw off the investigation? — on “Castle,” MONDAY, SEPTEMBER 27 (10:01-11:00 p.m., ET), on the ABC Television Network. (ABC/RICHARD CARTWRIGHT)

More / Larger Images: Castle Season S03E02 Photos / CASTLE-TV.INFO : ABC Castle TV Show FanSite & Info Archive

Additional photos of the season 3 cast of ABC’s Castle have been added to the gallery:

More / Larger Images: Castle Season 3 Publicity Photos / CASTLE-TV.INFO : ABC Castle TV Show FanSite & Info Archive

New promotional photos from the season 3 premiere of Castle are now available for viewing:

More / Larger Images: Castle Season 3 Episode S01E01 Photos / CASTLE-TV.INFO : ABC Castle TV Series FanSite & Info Archive

ABC has released a number of new publicity photos for the season 3 cast of “Castle” today:

More / Larger Images : Castle Season 3 Publicity Photos / CASTLE-TV.INFO : ABC Castle TV Series FanSite & Info Archive

Over 100 brand new promotional photos for Castle Season 2 episodes 4 through 8 have been added to the Castle-TV.Info Season 2 Photo Gallery.

Fifty-Four brand new promotional photos for the first three episodes of Castle Season 2 have been added to the Castle-TV.Info Season 2 Photo Gallery.

Forty-one cast publicity photos have been released in support of season 2 of Castle. These can be viewed in the new Castle-TV.Info Season 2 Photo Gallery.

Twenty-four official ABC promotional images for Season 1 Episode 10, the season finale, have been added to the Castle TV Series Photo Gallery for Season 1.