MUNICH, Sept. 3 — Twentieth Century-Fox took over the Southern Area Comd Hq building here and began shooting the interior scenes on the $2,500,000 film "Night People," starring Gregory Peck.

After two weeks on outdoor location in Berlin, the film crew arrived in Munich for a final six weeks of work indoors. The Technicolor-CinemaScope production is scheduled for release next spring.

Peck ran through several scenes in the second floor corridors of the SACom Hq and captivated an audience of Wacs and dependent wives who lined the stairways during the proceedings. The handsome star portrays an Army colonel in the film who tries to obtain the freedom of an American soldier held captive by the East Reds.

Peck has also been filming a Mark Twain story for J. Arthur Rank, called "Million Pound Note," and has been abroad 15 months.

He will go to Ceylon to make another film for Rank after completing "Night People."

The film star’s wife returned to the U.S. last month with the couple’s two children to enter them in schools. Peck expects to return to Hollywood by next April.