That's when broadcast networks celebrate the end-of-TV-season holes in their schedules because their regular series have completed their runs.

The network said today it will air two newly colorized episodes of its popular 1950s series from 8-9 PM Sunday, May 17. William Holden guest stars in "L.A. At Last!" (1955), and George Reeves — who was starring on TV's Adventures Of Superman at the time — reprises his role as the Man of Steel in "Lucy and Superman" (1957). Superhero tie-in nicely played, CBS.

The I Love Lucy Superstars Special's half-hour episodes are colorized "with a vintage look," the network says, explaining it's a nod to the era in which they were filmed.