9. In a strange turn of events, the TARDIS malfunctions and the Time Vortex seemingly disappears. Miraculously, it manages to land on Earth in a parallel dimension. In which Tenth Doctor episode does this happen?
From Quiz The Right Way To Travel
Answer:
Rise of the Cybermen
Believing the Time Vortex to have disappeared completely, the Doctor theorises that the TARDIS is stuck in the Void, the nothingness between dimensions. Upon opening the TARDIS doors, the Doctor, Rose and Mickey find themselves on Earth. However, they immediately notice things are amiss, the most odd being that Rose's father is alive (she witnessed his death during 'Father's Day', a Ninth Doctor episode). As the episode's title suggests, the Cybermen are the menace, having last appeared in the Seventh Doctor story 'Silver Nemesis' (though these were Mondas Cybermen rather than the Tenth Doctor's Cybus Cybermen).