By Michael Arbeiter, Hollywood.com Staff

Television is one of the few addictive substances that actually produces a very consistent personal schedule. On Tuesdays, Glee fans instinctively know to skip out of work a little early to get home before 8:00. Same goes for Community lovers on Thursdays. But the biological TV clocks in question look to be in store for a rewiring. Glee and Community, both renewed for fourth seasons for the upcoming fall season, will be experiencing schedule shifts.

Glee, which presently airs at 8 PM ET/PT on Tuesday nights on Fox, will be relocating to a 9 PM ET/PT slot on Thursday. This will pit the popular musical drama against the likes of NBC's The Office and Parks and Recreation, which have been renewed and reassigned to their respective 9 PM and 9:30 PM spots. Currently, other 9 PM network dramas include ABC'S Grey's Anatomy and CBS' Person of Interest, both of which have been renewed. Taking Glee's Tuesday spot are comedies Raising Hope and Fox newcomer Ben and Kate.

A more volatile change comes attached to Community's abridged fourth season. Presently occupying the very competitive 8 PM ET/PT spot on Thursday nights on NBC (opposite ratings victor The Big Bang Theory) is Community which is moving to the dreaded Friday night schedule at 8:30 PM ET/PT, immediately following Whitney. (Oof.)

This isn't going to do any favors for Community's already meager viewership; the move will only further the most dedicated Greendale junkies' quest for social isolation. But hey, being as awesome as Abed comes with a price.

[Image Credit: NBC]

Click here to see NBC's Complete Fall Schedule

Click here to see Fox's Complete Fall Schedule

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[Deadline][PAGEBREAK]MONDAY

8 - 10 PM - The Voice

10 - 11 PM - REVOLUTION

TUESDAY

8 - 9 PM - The Voice

9 - 9:30 PM - GO ON

9:30 - 10 PM - THE NEW NORMAL

10 - 11 PM - Parenthood

WEDNESDAY

8 - 8:30 PM - ANIMAL PRACTICE

8:30 - 9 PM - GUYS WITH KIDS

9 - 10 PM - Law & Order: Special Victims Unit

10 - 11 PM - CHICAGO FIRE

THURSDAY

8 - 8:30 PM - 30 Rock

8:30 - 9 PM - Up All Night

9 - 9:30 PM - The Office

9:30 - 10 PM - Parks and Recreation

10 - 11 PM - Rock Center with Brian Williams

FRIDAY

8 - 8:30 PM - Whitney

8:30 - 9 PM - Community

9 - 10 PM - Grimm

10 - 11 PM - Dateline NBC

SATURDAY

Encore programming

SUNDAY

Fall 2012

7 - 8:15 PM - Football Night in America

8:15 - 11:30 PM - NBC Sunday Night Football

Winter 2013

7 - 8 PM - Dateline NBC

8 - 9 PM - Fashion Star

9 - 10 PM - The Celebrity Apprentice

10 - 11 PM - DO NO HARM

[Image Credit: NBC]

Click here to see Fox's Complete Fall Schedule [PAGEBREAK] MONDAY

8 - 9 PM - Bones

9 - 10 PM - THE MOB DOCTOR

THE FOLLOWING joins in midseason.

TUESDAY

8 - 8:30 PM - Raising Hope

8:30-9 PM - BEN AND KATE

9 - 9:30 PM - New Girl

9:30-10 PM - THE MINDY PROJECT

THE GOODWIN GAMES joins in midseason.

WEDNESDAY

8 - 10 PM - The X Factor (fall) / American Idol (midseason)

THURSDAY

8 - 9 PM - The X Factor Results (fall) / American Idol Results (midseason)

9 - 10 PM - Glee

FRIDAY

8 - 9 PM - Touch

9 - 10 PM - Fringe (fall)

Hell's Kitchen returns midseason.

SATURDAY

7 - 10:30 PM - Fox Sports Saturday (fall)

Cops returns in midseason.

ANIMATION DOMINATION HIGH-DEF will join late-prime in 2013.

SUNDAY

7 - 7:30 PM - NFL Game (fall) / Animation Domination (encores)

7:30-8 PM - The OT (fall) / The Cleveland Show

8 - 8:30 PM - The Simpsons

8:30-9 PM - Bob's Burgers

9 - 9:30 PM - Family Guy

9:30-10 PM - American Dad

[Image Credit: FOX]

Click here to see NBC's Complete Fall Schedule