Oh brothers!

Jerry Van Dyke will guest star on the season opener of CBS’ “Diagnosis Murder” – reuniting with brother (and series star) Dick Van Dyke on television for the first time in 25 years.

The Van Dykes, who will play brothers, last worked together on a musical/variety show in 1974.

Remembering*

Tonight’s “Extra” (7 p.m. on Ch.4) will show exclusive footage of John F. Kennedy Jr. flying his single-engine plane during a snowstorm at Hyannis Airport last April.

*On tonight’s “Inside Edition (1:37 a.m. on Ch.2), Jackie Kennedy Onassis’ stepbrother, Hugh Auchincloss, speaks about JFK Jr.

*The History Channel will air “The Kennedy Legacy: An Interview with John F. Kennedy Jr.” tonight at 9 p.m.

*Tonight’s “60 Minutes II” (9 p.m. on Ch.2) takes a look at JFK Jr.’s life with footage and interviews.

*Tonight’s “Dateline” (10 p.m. on Ch.4): Sara James reports on the Kennedy family’s grief.

*Tomorrow’s “20/20” dedicates its whole hour (10-11 p.m.) to JFK Jr. with Sam Donaldson and Diane Sawyer reporting.

Express Lines:*Yankees hero David Cone, who tossed a perfect game on Sunday, drops by this morning’s “Live with Regis & Kathie Lee” (9 a.m. on Ch.7). MSG will also replay Cone’s perfect game on Thursday (7-10 p.m.).

*Ole! For the first time ever, Spanish-language Ch.41 beat Ch.9 and Ch.4 from 7 to 8 p.m. for a full week last week.

*David Alan Grier (“In Living Color”) will star in Fox Family Channel’s new sitcom, “Random Acts of Comedy.” It premieres this fall.

*The name of Turner Broadcasting’s new women’s cable network? The Women’s Network.

*Home & Garden Television will air over 800 hours of new original programming this fall including “Restore America,” hosted by Bob Vila.

*Noggin’s website? Over 133,000 hits since June 6!-