In Memphis, a truck fire brings Sgt. William Ashton and the homicide team to the scene of a double murder. When the smoke clears, Ashton must track down a series of suspects in pursuit of the killer. In Kansas City, Kansas, Det. Bill Michael works the murder of a woman found dead in the street. With few leads to go on, he's wondering how to find the killer when anyone could be a suspect.
The Winchesters investigate a series of crimes where robbers with no criminal past commit suicide after the hold-ups.
Following his defeat. Ash trains for a re-match. The training is interrupted when an ancient Pokemon is revived and goes wild. As Ash helps out, Ash gets some inspiration for a battle strategy for the rematch.
A Black samurai goes on a mission to avenge the wrongful death of his father in a futuristic feudal Japan.
Seth and Che get in some trouble with the police when Che drags Seth into helping him try to free a groundhog before Newport's annual Groundhog Day festival. Meanwhile, Kirsten gets some life altering news and Taylor gets some extra help from a therapist to make things different with Ryan.
It's old school vs. new school as Paul Sr. and Paul Jr. continue their competition to build OCC's next production bike.
After the Chief announces his retirement, rumors begin to circulate on his departure and successor. Mark is determined to leave Seattle for good but Meredith accidentally has him stay after letting him know of the open Chief position. Derek is angry at Meredith for causing Mark to stay in Seattle, but soon realizes that she is not the reason he is really angry. The attending physicians at Seattle Grace Hospital fight to get Richard's attention, but he expresses his disappointment. He also displays his lack of support in Bailey's plan to create a free medical clinic, but she ultimately goes through with her plan when Izzie offers to spend her entire 8.7 million dollar inheritance on the project. George, devastated after his father's death, uses sex to overcome his grief, and eventually proposes to Callie. Cristina and Burke still don't speak to each other, but he breaks the agreement when he proposes to her. Richard endeavors to reunite with his wife, Adele, and decides to retire, only to come home and find his wife with another man.
Cory Baxter moves to the White House in Washington, DC when his father Victor, is named the new personal White House chef of the President.
At Keppler's request Catherine uses a different approach to catch the killer, and in doing so she deceives the rest of the CSI team. The team soon discovers that something is amiss in Catherines investigation.
Jim talks Ryan down when they find out Dana was in a video where the participants expose themselves, but it's a different story when Jim finds out Cheryl was in the same video.
Allison's attempts to help two ghosts who've bonded over their respective murders is somewhat hampered by one who's left a sizable inheritance to a woman he barely knew.
Haley finds herself frustrated over her injuries while Skills and Mouth help Nathan find a job as a stripper in order to earn money for the senior prom. Meanwhile, Brooke betrays Rachel in order to get with a new guy and Lucas and Peyton finally reach happiness in their relationship.
The death of a drag queen appears to be related to an old rape case involving a congressman, and two of the suspects in a second murder case are discovered to have used a professional alibi-providing company to conceal their affair.
Smash's mom finds his steroids and reports them to Coach Taylor, forcing the coach to bench Smash for the next game. Matt's dad is recalled to Iraq leaving Matt to once again take care of his grandma. Lila's dad sets her up with a date and Jason gets upset.
In the season premiere episode, just as George and Angie finish sending their daughter off to college, Angie discovers that the Lopez family could be growing.
Veronica and Mac help campus researchers locate a missing monkey who was allegedly stolen by animal rights activists. Meanwhile, Keith is approached by Mindy O'Dell, who claims her husband's death was murder, not suicide. And in the aftermath of his breakup with Veronica, Logan turns to Dick for advice.
Mike joins forces with a master-cooper, or in laymen's terms, a barrel maker. Mike also teams up with some mule loggers.
Monica manages to seduce Frank and sink her claws back in, but he dare not tell Sheila that he and Monica have been sleeping together. Sheila proves to be a frightening adversary when scorned and Frank could be in real danger. But neither Sheila nor Monica want to share him and he has to decide on which wife he wants. But who will he choose?