PBS is making shows including “Nova” and “Arthur” available on Apple’s iTunes download store.

Demand for past PBS features on iTunes led the public broadcaster to add episodes from its prime-time and kids lineups, PBS President and CEO Paula Kerger said Tuesday in a statement.

New additions to iTunes include “Antiques Roadshow,” “Now” and “Scientific American Frontiers,” plus kids shows “Arthur,” “Cyberchase” and “Fetch!”

“PBS members and viewers of all ages are enjoying the new, expanded access to the content they want, when and where they choose,” Ms. Kerger said in a statement.

ITunes offers users more than 220 programs from more than 40 television networks.