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. in season | Title | Directed by | Written by | Original air date | U.S. viewers (millions) |
| --- | --- | --- | --- | --- | --- | --- |
| 209.0 | 3.0 | "Working Stiffs" | Naren Shankar | Naren Shankar | October8,2009 | 14.90 |
| 211.0 | 5.0 | "Bloodsport" | Jeffrey G. Hunt | Allen MacDonald | October29,2009 | 15.24 |
| 212.0 | 6.0 | "Death & The Maiden" | Brad Tanenbaum | Jacqueline Hoyt | November5,2009 | 15.60 |
| 213.0 | 7.0 | " The Lost Girls " | Alec Smight | David Weddle & Bradley Thompson | November12,2009 | 17.38 |
| 214.0 | 8.0 | "Lover's Lanes" | Andrew Bernstein | Dustin Lee Abraham | November19,2009 | 14.91 |
| 215.0 | 9.0 | "Appendicitement" | Kenneth Fink | Evan Dunsky | December10,2009 | 16.43 |
| 218.0 | 12.0 | "Long Ball" | Alec Smight | Christopher Barbour | January21,2010 | 14.29 |
| 219.0 | 13.0 | "Internal Combustion" | Brad Tanenbaum | Jennifer N. Levin | February4,2010 | 14.49 |
| 220.0 | 14.0 | "Unshockable" | Kenneth Fink | Michael Frost Beckner | March4,2010 | 15.59 |
| 221.0 | 15.0 | "Neverland" | Alec Smight | Tom Mularz | March11,2010 | 15.25 |
| 223.0 | 17.0 | "Irradiator" | Michael Nankin | Bradley Thompson & David Weddle | April8,2010 | 14.97 |
| 225.0 | 19.0 | "World's End" | Alec Smight | Evan Dunsky | April22,2010 | 13.35 |
| 226.0 | 20.0 | "Take My Life, Please!" | Martha Coolidge | David Rambo & Dustin Lee Abraham | April29,2010 | 13.63 |
| 227.0 | 21.0 | "Lost & Found" | Frank Waldeck | Corinne Marrinan & Elizabeth Devine | May6,2010 | 14.15 |
| 228.0 | 22.0 | "Doctor Who" (Part 1) | Jeffrey Hunt | Tom Mularz | May13,2010 | 13.42 |
Question:
How many U.S. viewers watched the episode directed by Frank Waldeck?
Answer:
14.15