(written from a Production point of view)
The Tadeski twins portrayed the infant Molly O'Brien in the 1991 Star Trek: The Next Generation episodes "Disaster" and "Power Play". The call sheets for the episodes are listing them only as "Tadeski twins". They appeared in several scenes with their film mother Rosalind Chao on the sets of Ten Forward and the sickbay. For "Disaster" they filmed their scenes on Friday 16 August 1991 on Paramount Stage 8 and for "Power Play" they filmed their scenes between 2 December 1991 and 11 December 1991. For some scenes they were replaced by a "baby dummy".