* Mental (8/7c Fox)
In the two-hour first-season finale, a factory worker with severed fingers refuses surgery to have them reattached. Meanwhile, Jack argues over the course of his sister's care, and for cappers, a patient (Joseph D. Reitman) tries to check himself into the psych ward, claiming that he will become a werewolf when the sun goes down. He's first thought to be a crank, but winds up holding the psych-ward staff hostage.
* Degrassi Goes Hollywood (8/7c The N)
The kids from Canada head to Hollywood in this two-hour special that features six original songs from cast members and appearances by Jason Mewes, Kevin Smith, Perez Hilton and Pete Wentz, among others. The adventure begins when Manny bombs at her audition for Jason Mewes' film "Mewesical High." Paige, however, wins the lead, and soon she acquires a diva-like attitude as well. But Manny's not going down without a fight: She and her pals take a road trip to L.A. so Manny can reclaim the lead.
* Neil Diamond - Hot August Night: NYC (8/7c CBS)
Whether a hot August night or a cool September morn, the time's never wrong for some beautiful noise. Who better to play it now than a (solitary) man who sings like a guitar hummin' - Neil Diamond, in other words. This special, culled from a four-night Madison Square Garden run in 2008, features such classics as "America," "Cherry, Cherry," Cracklin' Rosie," "I Am...I Said" and "Sweet Caroline," and includes a segment in which he ruminates about his childhood in Brooklyn while visiting his old family home.
* Woodstock: Now & Then (9/8c VH1)
The Woodstock festival, which has come, for better or worse, to conjure up '60s-counterculture imagery ever since it took place for three days in 1969, is recalled by those who played, partied and organized the event. Richie Havens, Carlos Santana and Country Joe McDonald remember the bash and are shown in performance. Festival organizer Michael Lang and "emcee" Wavy Gravy offer their thoughts, while music is also featured in clips of Janis Joplin, Jimi Hendrix, the Who, Sly and the Family Stone and Jefferson Airplane.
Lost's Adewale Akinnuoye-Agbaje guest stars tonight as a widower who, surprisingly enough, has quite a bit in common with Monk. He's visiting from Africa to investigate his wife's hit-and-run death. For obvious reasons, it's a scenario that resonates with Monk as he finds himself drawn to the grieving man. But the widower's case isn't the only one he's got on his plate Monk's also working on a bizarre and high-profile murder case in which the killer tended to the victim's wounds.