"History Detectives" (9 p.m., PBS): The detectives investigate a baseball from World War II, a

"History Detectives" (9 p.m., PBS): The detectives investigate a baseball from World War II, a Confederate eyeglass and a twin-cone roller rock bit.
"Glenn Miller's Last Flight" (10 p.m., PBS): On a flight to Paris during World War II, bandleader Miller's plane disappeared without a trace. This documentary tries to resolve what happened.
"Kyle XY" (8 p.m. ABC Family): A teen with no bellybutton realizes he might not be of this world.