Derek Jacobi (Claudius) was only seven years younger than Margaret Tyzack (Antonia), who played his mother.
That grandson of yours could wreck the empire just by strolling through it.
In the miniseries, Julia's son Gaius dies of a mysterious illness before she is banished, and Lucius dies after being wounded in battle. Historically, Lucius died of a mysterious illness before Gaius died in battle, and both died before Julia was banished.
The show aired in 13 episodes on PBS in 1977, but was originally shown in 12 episodes in England, the first and second episodes having been combined. This is the version now available in the remastered edition on DVD.