Did any planes land safely?

One plane landed in Vladivostok, Russia, where the crew was interned for a number of months. The plane was never returned.

How many fliers made it back to the States?

All 16 aircraft were lost on the mission, and 11 crewmen were either killed or captured. The crews of 13 aircraft, however, were recovered and returned to the United States, and a 14th crew interned by the Soviet Union eventually made its way home in 1943. While the military significance of the raid was minimal, it proved to be a substantial morale booster for Americans.

Fate of the missing crewmen

Following the Doolittle Raid, most of the B-25 crews that came down in China eventually made it to safety with the help of Chinese civilians and soldiers. The Chinese people who helped them, however, paid dearly for sheltering the Americans. The Japanese military began the Zhejiang-Jiangxi Campaign to intimidate the Chinese from helping downed American airmen. The Japanese killed an estimated 250,000 civilians while searching for Doolittle’s men.[27] The crews of two aircraft (10 men in total) were unaccounted for; Hallmark's crew (sixth off) and Farrow's crew (last off). On 15 August 1942, the United States learned from the Swiss Consulate General in Shanghai that eight of the missing crew members were prisoners of the Japanese at Police Headquarters in that city (two crewmen had died in the crash landing of their aircraft). On 19 October 1942, the Japanese announced that they had tried the eight men and sentenced them to death, but that several of them had received commutation of their sentences to life imprisonment. No names or details were included in the broadcast. Japanese propaganda ridiculed the raid, calling it the "Do-nothing Raid," and boasted that several B-25s had been shot down. In fact, none had been lost to hostile action.

After the war, the complete story of the two missing crews was uncovered in a war crimes trial held in Shanghai. The trial opened in February 1946 to try four Japanese officers for mistreatment of the eight captured crewmen. Two of the missing crewmen, Sgt. William J. Dieter and Cpl. Donald E. Fitzmaurice, had died when their B-25 crashed off the coast of China. The other eight, Lieutenants Dean E. Hallmark, Robert J. Meder, Chase J. Nielsen, William G. Farrow, Robert L. Hite, and George Barr; and Corporals Harold A. Spatz and Jacob DeShazer were captured. In addition to being tortured and starved, these men contracted dysentery and beriberi as a result of the poor conditions under which they were confined. On 28 August 1942, pilot Hallmark, pilot Farrow and gunner Spatz were given a mock trial by the Japanese, although the airmen were never told the charges against them. On 14 October 1942, these three crewmen were advised that they were to be executed the next day. At 16:30 on 15 October 1942, the three were taken by truck to Public Cemetery Number 1 outside of Shanghai and put before a firing squad.

The other five captured airmen remained in military confinement on a starvation diet, their health rapidly deteriorating. In April 1943, they were moved to Nanking where, on 1 December 1943, Meder died. The remaining four men (Nielsen, Hite, Barr and DeShazer) eventually began receiving slightly better treatment from their captors and were even given a copy of the Bible and a few other books. They survived until they were freed by American troops in August 1945. The four Japanese officers who were tried for war crimes against the eight Doolittle Raiders were all found guilty. Three of them were sentenced to hard labor for five years and the fourth to a nine-year sentence. DeShazer eventually became a missionary and returned to Japan in 1948, where he served in that capacity for over 30 years.

Of the group, only Hite is still alive. Barr died of heart failure in 1967, Nielsen in 2007 and Jacob DeShazer died 15 March 2008.

One other Doolittle Raid crewman was lost on the mission. Corporal Leland D. Faktor (flight engineer/gunner with Gray) was killed during his bailout attempt over China, the only man on his crew to be lost.

http://en.wikipedia.org/wiki/Doolittle_Raid