We haven’t yet mapped out the time travel itinerary.
INDEXER NOTES (SPOILERS!)
Credits—from the <a href='https%3A%2F%2Fwww.imdb.com%2Ftitle%2Ftt0059126%2Ffullcredits'>IMDb</a>:<br />
[list]<br />
screenplay by Milton Subotsky<br />
additional material by David Whitaker (uncredited) [we list him as providing additional contributions, since that’s how he was credited for the next film]<br />
directed by Gordon Flemying<br />
from the B.B.C. Television serial by Terry Nation [we list him as a creator]<br />
original concept by Sydney Newman (uncredited) [we list him as a creator]<br />