Broadway Joe still can ‘Figure’; ‘Cosby’ visits Tony Bennett; a documentary that’s servied ‘Straight Up’

In the season finale of Sister, Sister, Tia and Tamera don caps and gowns for their high school graduation (WB, Sunday at 8 p.m.). But the event isn’t entirely a celebration: Valedictorian Tia is pained when Tyreke (guest star Ronreaco Lee) breaks off their relationship just before graduation. Meantime, Terrell Davis of the Denver Broncos, the National Football League’s most valuable player, is recruited by Ray (Tim Reid) to be commencement speaker. For ages 8 and up.

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NFL legend Joe Namath is guest panelist for a special “sports week” on the comedy game show Figure It Out (Nickelodeon, Monday at 6 p.m.). The show will have a sports hero as a guest each day trying to guess contestants’ secret talent or invention. For ages 8 to 13.

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Tony Bennett performs at the Atlantic City hotel where Ruth (Phylicia Rashad) and her group hold a convention on Cosby (CBS, Monday at 8 p.m.). In the season finale, Ruth is elected the first woman president of the Astoria Businessmen’s Roundtable, making Hilton (Bill Cosby) the group’s “First Gentleman.” He is happy with his duties until he finds out that spouses aren’t welcome at the convention. For the family.

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Struggling to escape the violence that sometimes engulfs their lives, Latino and African American kids in South Central Los Angeles take to the stage and find self-esteem in Colors Straight Up (KCET, Tuesday at 10 p.m.). The documentary, nominated for an Academy Award, is about an after-school program at Jordan High School in Watts. For ages 12 and up.

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Pepper Ann fantasizes about having complete freedom from her family on “Family Vacation,” an episode of Pepper Ann, a segment of “Disney’s One Saturday Morning” (ABC, Saturday at 7:30 a.m). For ages 8 to 12.

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LeAnn Rimes in Concert (Disney Channel, Saturday at 7 p.m.) features the teenage singer in a performance taped at Orlando’s Walt Disney World. She is also seen leading the life of a typical teenager--roller-blading, playing softball, riding horses and enjoying Disney World. For ages 10 and up.