In the 86 sections in Space, 16.93% of tokens are in direct speech. There are between 0 and 3 speakers in each section (with a mean of 1.57, a median of 2.0, and a standard deviation of 0.69)

8 of the sections have 0 speakers:
Section 5 (01.125–159),
Section 15 (03.262–272),
Section 17 (04.024–032),
Section 35 (08.193–209),
Section 42 (10.181–184),
Section 90 (24.051–055),
Section 102 (26.038–063),
Section 109 (29.001–027).

2 of the sections have 3 speakers:
Section 46 (12.001–074),
Section 48 (12.142–253)

The number of tokens spoken by each character in the Space sections are:

Grace: 13,089 (57.66%)
Rocky: 9,071 (39.96%)
Computer: 539 (2.37%)

In the 30 sections on Earth, 59.66% of tokens are in direct speech. There are between 0 and 11 speakers in each section (with a mean of 4.10, a median of 4.0, and a standard deviation of 2.57)

Only 1 of the sections has no direct speech : Section 4 (01.104–124).

And only 1 of the sections has the maximum 11 speakers: Section 25 (05.128–217).

The number of tokens spoken by the top ten characters in the Earth sections are:

Grace: 11,521 (33.78%)
Stratt: 10,178 (29.84%)
Dr. Lokken: 2,406 (7.05%)
Steve Hatch: 1,320 (3.87%)
Leclerc: 1,312 (3.85%)
Bob Redell: 1,300 (3.81%)
Dimitri: 1,172 (3.44%)
DuBois: 816 (2.39%)
Dr. Browne: 425 (1.25%)
Dr. Lamai: 405 (1.19%)