The first episode of series 5 is called The Eleventh Hour.
The first episode of series 3.
At right at the start of Smith and Jones episode.
Matt Smith first apears in the last episode of season 4, episode 18, "The End of Time (Part 2)" and returns in the first episode of season 5 in "The Eleventh Hour."
"The Time of the Doctor", a Christmas special on Dec 25, 2013, was the last full episode with Matt Smith as the Doctor. Matt Smith did a cameo appearance in the new season with Peter Capaldi as the new doctor in the episode "Deep Breath" aired in August 23, 2014.
Doctor Who: The Time Warrior
Series 5 (Matt Smith's first Episode)
It was called 'the Daleks'
The episode is called Logopolis and is also the first appearance of Peter Davison (the fifth Doctor).
Spearhead from Space.
THey first appeared in 1963, in an episode called 'The Daleks'. There was a Doctor Who movie called 'Doctor Who and The Daleks', But I'm not sure when that was released.
"The Unearthly Child" was the first named episode, there was a pilot episode before it.
The Eleventh Hour.