5 Things You Didn't Know About NCIS' "Reasonable Doubts"

DC Home Security Patrol, which responded to Angelina Jennings' distress call, has been featured on the show before.

DC Home Security Patrol, which responded to Angelina Jennings' distress call, has been featured on the show before.

The security company also employed Harvey Ames (played by Eric Stonestreet) as a guard in the Season 6 episode "Silent Night."
The piano piece Susan performed in Tony's apartment was an original work by NCIS composer Brian Kirk.

The piano piece Susan performed in Tony's apartment was an original work by NCIS composer Brian Kirk.

Melora Walters, who played Susan, is not a pianist and was taught to play the piece on set. 
NCIS Producer Frank Cardea and writer George Schenck really wanted this episode to resonate.

NCIS Producer Frank Cardea and writer George Schenck really wanted this episode to resonate.

"We're hoping [the] episode will make our audience aware of the plight of homeless veterans, and the fact that eight percent of homeless veterans are women," they said. 
Robert Wagner and David McCallum reminisced on set about the first time they worked together back in 1972.

Robert Wagner and David McCallum reminisced on set about the first time they worked together back in 1972.

The actors first starred together on a British TV series, and found themselves side-by-side over 40 years later!