June Lockhart and Jon Provost will be together again with Lassie on a silver-anniversary reunion episode to be shot next week for MCA-TV's new syndicated "Lassie" series. Provost was the on CBS' "Lassie" from 1957-64, and Lockhart was on the same show from 1958-64. . . . Actor Roger Moore started work Wednesday in York, Me., on "Bed and Breakfast," his first film since he portrayed James Bond in "A View to a Kill" four years ago. . . . Former television talk-show host Jack Paar has been released from New York Hospital in good condition after suffering a heart attack two weeks ago.