|Occupation||LA Police Officer|
|Job title||Homicide Detective|
|Portrayer||Barry Van Dyke|
|First Seen||Diagnosis of Murder|
|Last Seen||Without Warning|
Police Detective/Lieutenant Steve Sloan, is a police detective/lieutenant. The character appears in all episode of all seasons.
Steve Sloan is the son of Dr. Mark Sloan and Mark's wife, Katherine. Katherine died of cancer when Steve was younger—throughout the series, Mark refers to her death occurring "ten years ago." Steve has one sibling, an estranged sister named Carol. (Carol is only mentioned in a few episodes.)
Right out of college, he joined the army and spent 18 months on one tour to Vietnam during the War. He took a second tour towards the end of the war. Afterwards, Steve joined the LAPD and, after season two, was promoted from homicide detective to lieutenant. Following this appointment, Steve was subsequently promoted to his own one man army, in his genuine pursuit of justice
His apartment burns down, he moves to a separate apartment in his father's Malibu beach house. He often tries to move away, once even buying an electric house. After the house almost kills Mark, Steve begins renting it. Steve was once shot in the chest and was legally dead for three minutes until doctors were able to resuscitate him. This makes him a target in "Murder On The Hour".
Sloan is unmarried and it becomes a running gag that all his girlfriends turn out to be involved in murders he is currently investigating. Or, they end up dead. In "Without Warning", he proposes to Ellen Sharp, and she says yes.
As a character he is quite active. Sloan played Little League, where he badly broke his nose, and American football in high school. He is quite athletic, enjoying jogging and playing and watching basketball, while he also rides dirtbikes and has a small catamaran on the beach. One of his dreams was to become a stunt man and in the episode "Frontier Dad" (Season Seven) he gets this chance, though is overcome with stage fright. (This episode was also written by Barry Van Dyke and starred all of Barry's children.) He also often uses his patented dive to apprehend criminals.
- Steve Sloan was portrayed by Barry Van Dyke, the real-life son of Dick Van Dyke.