Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| No. in series | No. Disc | Title | Directed by | Written by | Original air date | Length (minutes) |
| --- | --- | --- | --- | --- | --- | --- |
| Pilot | 1.0 | " Children of the Gods " | Mario Azzopardi | Jonathan Glassner & Brad Wright | July27,1997 ( Showtime ) | 95.0 |
| 2 | 1.0 | "The Enemy Within" | Dennis Berry | Brad Wright | August1,1997 (Showtime) | 43.0 |
| 3 | 1.0 | "Emancipation" | Jeff Woolnough | Katharyn Michaelian Powers | August8,1997 (Showtime) | 44.0 |
| 4 | 2.0 | "The Broca Divide" | Bill Gereghty | Jonathan Glassner | August15,1997 (Showtime) | 44.0 |
| 5 | 2.0 | "The First Commandment" | Dennis Berry | Robert C. Cooper | August22,1997 (Showtime) | 44.0 |
| 6 | 2.0 | "Brief Candle" | Kenneth J. Girotti | Jeff F. King | September19,1997 (Showtime) | 44.0 |
| 7 | 2.0 | "Cold Lazarus" | Charlie Correll | Jeff F. King | August29,1997 (Showtime) | 44.0 |
| 8 | 2.0 | "Thor's Hammer" | Mario Azzopardi | Katharyn Michaelian Powers | September26,1997 (Showtime) | 44.0 |
| 9 | 3.0 | "The Torment of Tantalus" | Jonathan Glassner | Robert C. Cooper | October3,1997 (Showtime) | 44.0 |
| 10 | 3.0 | "Bloodlines" | Mario Azzopardi | Jeff F. King | October10,1997 (Showtime) | 44.0 |
| 11 | 3.0 | "Fire and Water" | Allan Eastman | Katharyn Michaelian Powers | October17,1997 (Showtime) | 44.0 |
| 12 | 3.0 | "The Nox" | Brad Turner | Hart Hanson | September12,1997 (Showtime) | 44.0 |
| 14 | 4.0 | "Cor-ai" | Mario Azzopardi | Tom J. Astle | January23,1998 (Showtime) | 44.0 |
| 15 | 4.0 | "Singularity" | Mario Azzopardi | Robert C. Cooper | October31,1997 (Showtime) | 44.0 |
| 16 | 4.0 | "Enigma" | Bill Gereghty | Katharyn Michaelian Powers | January30,1998 (Showtime) | 44.0 |
| 17 | 4.0 | "Tin Man" | Jimmy Kaufman | Jeff F. King | February13,1998 (Showtime) | 44.0 |
| 18 | 4.0 | "Solitudes" | Martin Wood | Brad Wright | February6,1998 (Showtime) | 44.0 |
| 19 | 5.0 | "There But for the Grace of God (1)" | David Warry-Smith | Robert C. Cooper | February20,1998 (Showtime) | 44.0 |
| 20 | 5.0 | "Politics (2)" | Martin Wood | Brad Wright | February27,1998 (Showtime) | 38.0 |
Question:
Name the maximum number of disc for bill gereghty
Answer:
4.0