The movies would carry over at least one tradition from the Series (bringing back an actor in an entirely new role): in this case Richard Anderson, who for the final year has starred as Lt. Steve Drumm (it's actually his third separate role as he had earlier played another character Ep213 TCOT Paper Bullets). Notcom 051722.
Paul (Drake) was portrayed as unmarried in the Series, and so, presumably was childless. Notcom 051722.
Detective Paul Drake, Jr. is played by William Katt in the PM TV Movies. William is Barbara Hale's real-life child. CMC 01Jun22