Jonny Lee Miller and Lucy Liu star in "Elementary"

Sherlock buffs beware: the world's greatest detective is on the move. Fans looking for their Thursday night Sherlock fix are in for a mystery this week -- he'll disappear, at least from Thursday nights.

Viewers must tune in earlier in the week to catch British actor Jonny Lee Miller ("Trainspotting," 1996) as an eccentric modern-day version of Sir Arthur Conan Doyle's classic character, as "Elementary" moves to Sundays, beginning March 20, on CBS. The series also stars Lucy Liu ("Charlie's Angels," 2000) as Sherlock's apprentice, Dr. Watson, who began working with Holmes as his sober-living companion after the detective's stint in rehab for drug addiction.

The cast also includes Aidan Quinn ("Legends of the Fall," 1994) as NYPD Capt. Tommy Gregson, Jon Michael Hill ("Detroit 1-8-7") as Det. Marcus Bell and new addition John Noble ("Fringe") as Holmes' estranged father, Morland.

Now in its fourth season, much of the success of the series relies on the interaction between Miller and Liu. Despite what many TV viewers might expect, Watson and Sherlock aren't romantically linked and it doesn't look as if the writers have any plans to have them hook up any time soon. Show creator and producer Robert Doherty has described their relationship as a "bromance," in which one of the "bros" is really a woman. Things are strictly platonic, at least so far. In a recent interview with the New York Post, Miller explained why.

"Holmes and Watson's relationship is sacred," said Miller. "The fact that one's a man and one's a woman is irrelevant; it's who they are as people that's important. The original Holmes and Watson were not romantically involved and, therefore, neither should we [be]."

The lack of chemistry between them is in line with the source material as Conan Doyle's original Sherlock had little interest in romance anyway. In "The Adventure of The Lion's Mane," the detective explained: "Women have seldom been an attraction to me, for my brain has always governed my heart."

In the absence of that will-they-won't-they tension employed by so many television dramas and comedies, the show relies on solid acting and clever dialog as the mysteries unfold each week. While acting as a consultant for the NYPD, Holmes leads Watson through an investigation, which offers viewers many twists and turns before a final resolution as Holmes nabs the bad guy or gal in true Sherlock Holmes fashion.

In fact, the modern Holmes pays tribute to the original in many ways. In addition to inheriting his uncanny powers of deduction, Miller's Holmes boasts many other attributes of Doyle's detective. He seems to have a good grasp of forensics and often uses this knowledge to solve cases that, for whatever reason, baffle NYPD detectives. Much like the initial Holmes, "Elementary's" sleuth is financially secure, thanks no doubt to his business consultant father. Even Sherlock's penchant for drugs factors into the CBS adaptation -- Doyle's Watson disapproved of his colleague's cocaine use, however, with the exception of a relapse at the end of season 3, Miller's Holmes isn't an active user in the CBS drama.

Aidan Quinn as seen in "Elementary"

Interestingly, Miller famously rose to prominence as another addict in the 1996 film "Trainspotting," in which he starred as con artist Sick Boy. He's also widely remembered for his role in the cult classic "Hackers" (1995), which featured a young Angelina Jolie ("Girl, Interrupted," 1999).

Liu's Watson bears some similarity to Doyle's original as well. Both characters are medical doctors, though the modern Watson left the profession after losing a patient, which is how she came to work with Holmes as his sober-living companion. Doyle's Watson also occasionally shared a flat with Holmes, and both versions of the character revere Holmes' ability to solve crimes.

After paying her dues with roles in commercials, theater, TV and movies, Liu really captured the attention of audiences as Ling Woo in the hit TV series "Ally McBeal." The role, which was created specifically for her, earned her an Emmy nomination and led to parts in high-profile movies such as "Charlie's Angels" (2000), "Kill Bill: Vol. 1" (2003) and "Lucky Number Slevin" (2006).

Although similarities to the original characters are to be expected, there was initially some concern about "Elementary's" resemblance to the BBC's "Sherlock," which also put a modern spin on the classic Sherlock tale. Starring Benedict Cumberbatch, the show had been around since 2010 and was a huge hit, prompting many to presume that "Elementary" was merely a copycat series.

However, "Elementary" has since persevered and won over many critics. The show has earned nominations for several high-profile awards, including Emmys, Prism Awards and GLAAD Media Awards. Ratings have declined slightly since its debut season in 2012-13, but recent episodes have been gaining ground, many breaking the six million viewer mark since January, compared to an average of just over five million viewers this fall.

To find out what has people so intrigued, join Holmes and Watson on Sundays from now on. The next new episode airs Sunday, March 20, on CBS.