Allison Lange

When a teenager and her sister are the sole survivors of the gruesome murder of four members of one family in a quiet suburban neighborhood, Grissom and his entire team investigate the crime. What initially looks like a bizarre cult murder becomes more disturbing when they discover the motive behind the massacre.

Laurie Dupree, the girl who Isabel and Sheriff Valenti saved, suddenly claims she is being pursued by aliens and the conflicting information on the case causes Valenti his job.

After Michael discovers he’s a dead ringer for Laurie’s grandfather he and Maria help Laurie escape before she can be taken back to the psychiatric hospital her family put her in.

While Maria and Michael keep on eye on Laurie, Max learns that the blue crystals found by Laurie’s burial site are a parasite which has the power to kill everyone on the planet.

When a family of bullies targets a local rodeo and threatens Trivette with death, Walker must step in to prevent serious harm.