Sarah Bloom

Brennan and Booth rush to investigate a scene where a dead man has been found in a crater. It appears that the flattened body has fallen from a high altitude without a parachute, and when the remains are sent to the Jeffersonian for review, Hodgins' bone analysis leads him to believe that the body had been in outer space for a period of time. While Hodgins suggests multiple theories about extraterrestrial life and government conspiracies, Brennan and Booth attempt to discover the man's identity. They find out he was an astronaut named Colonel Howard who worked for the National Space Agency, and as they speak to his co-workers and family members, they struggle to extract pertinent information due to the confidentiality of his missions. When the team finds slash-like wounds on some of his bones, they discover that Colonel Howard's fall was no accident, and a complicated murder mystery unfolds. Meanwhile, thwarted in his previous attempt to propose to Angela, Hodgins tries a more traditional, romantic approach to winning her heart.

When a young researcher at the Heritage Museum is found dead, Don and Megan are called to the scene to investigate. With Charlie's help, they discover that she had been investigating the origin of a human skull found on Wiyana Native American land, which has now gone missing. In searching for the skull and the murderer, they encounter a political web of cover ups and deceit involving the Indian Chief. Graham Greene guest stars.

When a student is killed with a screwdriver, detectives discern a strong similarity between his bold design for a downtown building and that of a celebrated architect.

The CSIs investigate when the parents of a baby sitter in an upscale neighborhood are murdered. As the team sorts through the neighbors' secrets and lies, they find an unexpected love triangle as a motive for murder. Meanwhile, a key piece of evidence found at the crime scene leads Horatio to expose a doctor with some dirty secrets of his own. (TV_PG)

Peggy is cornered and more vulnerable than ever as Leviathan makes their move against her. As the SSR zeroes in on Howard Stark, they may pay the ultimate price as they find their true enemy is closer than they realized.