NCIS The hit drama airs its 300th episode with Taye Diggs guest starring as the hospitalized sole survivor of an attack on a special ops team in Iraq. Mark Harmon stars with guest star Laura San Giacomo. 8 p.m. CBS
The Flash Barry (Grant Gustin) and company try to locate Zoom on the alternate version of Earth. 8 p.m. KTLA
New Girl Jess (Zooey Deschanel) wants to help Cece (Hannah Simone) move in to the loft, but her new boss (guest star Elizabeth Berkley) has a task for her. 8 p.m. Fox
Pretty Little Liars In the winter finale, when a stalker threatens to kill all the...